----------------------------------------
****Math and Constant***
package local_global_instance;
import java.util.Date;
import static java.lang.Math.*;
public class InstanceVariable {
public static void main(String[] args) {
System.out.println(PI);
System.out.println(E);
System.out.println(sqrt(25));
System.out.println("e= "+E);
System.out.println(Integer.parseInt("30"));
Date dt=new Date(0);
System.out.println("Date is="+dt);
}
}

****Prime number test***
package ArrayDemo;
import java.io.*;
import java.util.Scanner;
public class Array1 {
public static void main(String[]args){
Scanner s=new Scanner(System.in);
System.out.println("Please type any integer= ");
int a=s.nextInt();
for(int i=2; i<=a;i++){
if(i==a){
System.out.println(a+"is a prime number");
}else{
if(a%i==0){
System.out.println(a+"is not a prime number");
break;
}
}
}
}
}

****Word breaks verticaly***
package ArrayDemo;
import java.util.Scanner;
public class Array1 {
public static void main(String[]ergs){
System.out.println("Please type a word=");
Scanner s=new Scanner(System.in);
String st=s.nextLine();
for (int i = 0; i <=st.length()-1; i++) {
System.out.println(st.charAt(i));
}
}

} ****Identify Even or Odd number***
package ArrayDemo;
import java.util.Scanner;
public class Array1 {
public static void main(String[] args) {
System.out.println("Please enter an Integer= ");
Scanner input=new Scanner(System.in);
int num;
num=input.nextInt();
if(num%2==0){
System.out.println("The number is even;");
}else{
System.out.println("The number is odd;");
}
}
}

****Convert lowercase to upper case***
//if user input lowercase word convart uppercase!
package basicjava;
import java.util.Scanner;
public class BioData {
public static void main(String[] args) {
System.out.print("Please type a lowercase word= ");
Scanner sc=new Scanner(System.in);
String userInput =sc.next();
String uppercased = userInput.toUpperCase();
System.out.println(userInput);
System.out.println(uppercased);
char firstCharacter=userInput.charAt(0);
System.out.println(firstCharacter);
System.out.println("Contains= "+
userInput.contains("Enter".toLowerCase()));
}
}

****if user input lowercase word convert uppercase***
//if user input lowercase word convart uppercase!
package basicjava;
import java.util.Scanner;
public class BioData {
public static void main(String[] args) {
System.out.print("Please type lowercase word= ");
Scanner sc=new Scanner(System.in);
String userInput =sc.next();
String uppercased = userInput.toUpperCase();
System.out.println(userInput);
System.out.println(uppercased);
}
}
****Enter any number integer or decimal***
package basicjava;
import java.util.Scanner;
public class BioData {
public static void main(String[] args) {
System.out.print("Please type any number= ");
Scanner sc=new Scanner(System.in);
int userNumber = sc.nextInt();
System.out.println(userNumber);
double userNumber2=sc.nextDouble();
System.out.println(userNumber2);
}
}

****While Loop***
package basicjava;
import java.awt.Color;
public class BioData {
public static void main(String[] args) {
//while loop
System.out.println("while loop");
int x=3;
while(x>=0+1){
System.out.println("Current x= "+x);
x=x-1;
}
System.out.println("Final x= "+x);
System.out.println();
}
}
****do while loop***
package basicjava;
import java.awt.Color;
public class BioData {
public static void main(String[] args) {
//do while loop
System.out.println("while loop");
int y=3;
do{
System.out.println("Current y= "+y);
y=y-1;
}while(y>=+1);
System.out.println("Final y= "+y);
System.out.println();
}
}

***for loop***
package basicjava;
import java.awt.Color;
public class BioData {
public static void main(String[] args) {
//for loop
System.out.println("for loop");
for (int i = 3; i >= 0+1; i--) {
System.out.println("Current i= "+i);
}
System.out.println();
}
}
****16.Input integer or double(decimal) number***
package basicjava;
import java.util.Scanner;
public class BioData {
public static void main(String[] args) {
System.out.print("Please type any number= ");
Scanner sc=new Scanner(System.in);
int userNumber = sc.nextInt();
System.out.println(userNumber);
double userNumber2=sc.nextDouble();
System.out.println(userNumber2);
}
}

****11.Get Users input***
package beginnerjava;
import java.util.Scanner;
public class InputDemo {

public static void main(String[] args) {

Scanner input= new Scanner(System.in);
double num;

System.out.print("Enter any double value: ");

num=input.nextDouble();
System.out.println("Double value is="+num);
}
}

****12. Assignment Operators***
package beginnerjava;
import java.util.Scanner;
public class AssignmentDemo {

public static void main(String[] args) {
Scanner input= new Scanner(System.in);

int x,y;
System.out.print("Enter first value x= ");
x=input.nextInt();
System.out.print("Enter second value y= ");
y=input.nextInt();

x +=y;
System.out.println("x= "+x);

x -=y;
System.out.println("x= "+x);

x *=y;
System.out.println("x= "+x);

x /=y;
System.out.println("x= "+x);

x %=y;
System.out.println("x= "+x);

}
}

****13. Arithmatic Operators***
package beginnerjava;
import java.util.Scanner;
public class ArithmaticDemo {

public static void main(String[] args) {

Scanner input= new Scanner(System.in);

int num1, num2,sum,sub,mult,redu;
double divi;
System.out.print("Enter first Integer number= ");
num1=input.nextInt();
System.out.print("Enter second Integer number= ");
num2=input.nextInt();

sum=num1+num2;
sub=num1-num2;
mult=num1*num2;
divi=(double)num1/num2;
redu=num1%num2;

System.out.println("Sum is="+sum);
System.out.println("Subtraction is="+sub);
System.out.println("Multiplication is="+mult);
System.out.println("Division is="+divi);
System.out.println("Reduces is="+redu);
}
}

***14. Area of a Circle***
package beginnerjava;
import java.util.Scanner;
public class CircleDemo {

public static void main(String[] args) {

Scanner input= new Scanner(System.in);
double r, A;
System.out.print("Enter radius r= ");
r=input.nextDouble();

A=3.1416*r*r;

System.out.println("Area of circle is="+A);
}
}

***15. Convert temperature Celcius to Ferenhite***
//Convert temperature Celcius to Ferenhite
package beginnerjava;
import java.util.Scanner;
public class TemperatureDemo {

public static void main(String[] args) {

Scanner input= new Scanner(System.in);
double c,f;
System.out.print("Enter temperature degree cencius c=");
c =input.nextDouble();
f = 9*c/5+32;
System.out.println("Degree ferenhite is= "+ f);
}
}

****15. Convert temperature celcius to ferenhite***
//Convert temperature Ferenhite to Celcius
package beginnerjava;
import java.util.Scanner;
public class TemperatureDemo {

public static void main(String[] args) {

Scanner input= new Scanner(System.in);
double c,f;
System.out.print("Enter temperature degree ferenhite f=");
f =input.nextDouble();
c = 5*(f-32)/9;
System.out.println("Degree celcius is= "+ c);
}
}

****16. Unary Operators***
package beginnerjava;
public class UnaryDemo {
public static void main(String[] args) {
int x=10;
int result;

result=+x;
System.out.println("result="+result);

result=-x;
System.out.println("result="+result);
}
}

****16***
package beginnerjava;
public class UnaryDemo {
public static void main(String[] args) {
int x=-10;
int result;

result=+x;
System.out.println("result="+result);

result=-x;
System.out.println("result="+result);

}

}

****17. Increment and Decrement***
package beginnerjava;
public class IncrementDecrement {
public static void main(String[] args) {
int x=25;
int y;

y=x++;
System.out.println("y= "+y);

y=x;
System.out.println("y= "+y);

y=++x;
System.out.println("y= "+y);

y=x;
System.out.println("y= "+y);

y=x--;
System.out.println("y= "+y);

y=x;
System.out.println("y= "+y);

y=--x;
System.out.println("y= "+y);

}
}

****18.Positive number Use (if,condition)***
package beginnerjava;
import java.util.Scanner;
public class PositiveDemo {
public static void main(String[] args) {

Scanner input=new Scanner(System.in);
int num;
System.out.print("Enter any integer number num= ");
num=input.nextInt();
if(num>0){
System.out.println("Positive number");
}
}
}

****18.Positive/Negative number use ( if, else)***
package beginnerjava;
import java.util.Scanner;
public class PositiveDemo {

public static void main(String[] args) {

Scanner input=new Scanner(System.in);
int num;
System.out.print("Enter any integer number num= ");

num=input.nextInt();

if(num>0){
System.out.println("Positive number");
}else{
System.out.println("Negative number or zero");
}
}
}

****18. Positive/Negative/zero number use(if, else if, esle)***
package beginnerjava;
import java.util.Scanner;
public class PositiveDemo {

public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int num;
System.out.print("Enter any integer number num= ");
num=input.nextInt();
if(num>0){
System.out.println("Positive number");
}
else if(num<0){
System.out.println("Negative number");
}else{
System.out.println("The number is zero.");
}
}
}

****19. Even and Odd use (if, else)***
package beginnerjava;
import java.util.Scanner;
public class EvenOdd {

public static void main(String[] args) {

Scanner input=new Scanner(System.in);
int num;

System.out.println("Enter a positive integer num= ");
num=input.nextInt();

if(num/2==0){
System.out.println("The number is Even ");
}else{
System.out.println("The number is Odd ");
}
}
}

***Vowel/Consonant use (if, else if, else)***
package beginnerjava;
import java.util.Scanner;
public class VowelConsonantDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
char ch;
System.out.print("Enter any letter= ");
ch=input.next().charAt(0);
if(ch=='a'){
System.out.println("Vowel");
}else if(ch=='A'){
System.out.println("Vowel");
}else if(ch=='e'){
System.out.println("Vowel");
}else if(ch=='E'){
System.out.println("Vowel");
}else if(ch=='i'){
System.out.println("Vowel");
}else if(ch=='I'){
System.out.println("Vowel");
}else if(ch=='o'){
System.out.println("Vowel");
}else if(ch=='O'){
System.out.println("Vowel");
}else if(ch=='u'){
System.out.println("Vowel");
}else if(ch=='U'){
System.out.println("Vowel");
}else{
System.out.println("Consonant");
}
}
}

****Vowel/Consonant use(if, else if, else, ||) ***
package beginnerjava; import java.util.Scanner;
public class VowelConsonant {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
char ch;
System.out.print("Enter any letter= ");

ch=input.next().charAt(0);
if(ch=='a'||ch=='A'){
System.out.println("Vowel");
}else if(ch=='e'||ch=='E'){
System.out.println("Vowel");
}else if(ch=='i'||ch=='I'){
System.out.println("Vowel");
}else if(ch=='o'||ch=='O'){
System.out.println("Vowel");
}else if(ch=='u'||ch=='U'){
System.out.println("Vowel");
}else{
System.out.println("Vowel");
}
}
}

****Vowel/Consonant use (if, else, ||)***
package beginnerjava; import java.util.Scanner;
public class VowelConsonant {

public static void main(String[] args) {

Scanner input=new Scanner(System.in);

char ch;
System.out.print("Enter any letter= ");

ch=input.next().charAt(0);

if(ch=='a'||ch=='A'||ch=='e'||ch=='E'||ch=='i'||ch=='I'||ch=='o'||ch=='O'||ch=='u'||ch=='U'){

System.out.println("Vowel");
}else{
System.out.println("Consonant");
}
}
}

****21. Small and Capital Letter use(if, else if, else, &&)***
package beginnerjava;
import java.util.Scanner;
public class SmallletterCapitalletter {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);

char ch;
System.out.print("Enter any Letter= ");

ch=input.next().charAt(0);

if(ch>='a'&& ch<='z'){//a-z
System.out.println("Small Letter");
}else if(ch>='A'&& ch<='Z'){//A-Z
System.out.println("Capital Letter");
}else{
System.out.println("Not a Letter");
}
}
}

****Digit Spelling use (Switch)***
package beginnerjava;
import java.util.Scanner;
public class DigitSpelling {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int digit;
System.out.print("Enter any digit= ");
digit=input.nextInt();

switch(digit){
case 0:
System.out.println("Zero");
break;

case 1:
System.out.println("One");
break;

case 2:
System.out.println("Two");
break;

case 3:
System.out.println("Three");
break;

case 4:
System.out.println("Four");
break;

case 5:
System.out.println("Five");
break;

case 6:
System.out.println("Six");
break;

case 7:
System.out.println("Seven");
break;

case 8:
System.out.println("Eight");
break;

case 9:
System.out.println("Nine");
break;

default:
System.out.println("Is not any digit!");
}
}
}

****Identify Large Number use(condition(num1>num1) ? num1 if true : num2 if false;)***
package beginnerjava;
import java.util.Scanner;
public class ConditionalDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int num1,num2,large;
System.out.print("Enter 1st Number =");
num1=input.nextInt();
System.out.print("Enter 2nd Number =");
num2=input.nextInt();
large=(num1>num1)?num1:num2;
System.out.println("Large Number Is= "+large);
}
}

****Identify small number use use(condition(num1***
package beginnerjava;
import java.util.Scanner;
public class ConditionalDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int num1,num2,small;
System.out.print("Enter 1st Number =");
num1=input.nextInt();
System.out.print("Enter 2nd Number =");
num2=input.nextInt();
small=(num1 System.out.println("Large Number Is= "+ small);
}
}

****Bitwize Operator(Bitwize AND,Bitwize OR,Bitwize EXOR***
package beginnerjava;
public class BitwizeOperator {
public static void main(String[] args) {

int a=32;
int b=12;
int c;

c=a & b;
System.out.println("a & b="+c);

c=a | b;
System.out.println("a | b= "+c);

c=a ^ b;
System.out.println("a ^ b= "+c);

}
}

****BitwizeDemo(Right shift & Left Shift)***
package beginnerjava;
public class BitwiseDemo {
public static void main(String[] args) {
int a=32;
int b=3;
int c;
c=a >> b;
System.out.println("a >> b="+c);
c=a << b;
System.out.println("a << b = " +c);
}
}

****Math class(Indecate Maximum)***
package beginnerjava;
public class MathDemo {
public static void main(String[] args) {
int x=20;
int y=10;
System.out.println(Math.max(x, y));
}
}

****Math class(Indecate Minimum)***
package beginnerjava;
public class MathDemo {
public static void main(String[] args) {
int x=20;
int y=10;
System.out.println(Math.min(x, y));
}
}

****Math Class***
package beginnerjava;
public class MathDemo {
public static void main(String[] args) {
int x=2;
int y=-3;
double pi=Math.PI;
int max=Math.max(x, y);
int min=Math.min(x, y);
int absolute=Math.abs(y);
double power=Math.pow(x, y);
int round =Math.round(8.5f);
System.out.println("pi value is= "+pi);
System.out.println("8.5 round figure is= "+ round);
System.out.println("x to the Power y value is= "+power);
System.out.println("Ablolute value of y is= "+absolute);
System.out.println("Maximum value= "+max);
System.out.println("Minimum Value= "+min);
}
}

****For Loop:***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=1;i<=10;i++){
System.out.println("Bangladesh");
}
}

****For Loop: Six times print***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=5; i<=10; i++){
System.out.println("Bangladesh");
}
}
}

****For Loop:(3,4,5,6,7,8,9,10)8times duration 1***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=3; i<=10; i++){
System.out.println("Bangladesh");
}
}
}

****For Loop:(3,5,7,9)Four times print duration 2***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=3; i<=10; i=i+2){
System.out.println("Bangladesh");
}
}
}

****For Loop:***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=3; i<=10; i=i+2){
System.out.println(i+"Bangladesh");
}
}
}

****For Loop:***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=3; i<=10; i++){
System.out.println(i+"Bangladesh");
}
}
}

***For Loop:1-100***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=1; i<=100; i++){
System.out.println(i);
}
}
}

****For Loop:(2,4,6...100)***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=2; i<=100; i=i+2){
System.out.println(i);
}
}
}
****For Loop:(1,3,5,7,...,19)***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=1; i<=20; i=i+2){
System.out.println(i);
}
}
}

****For Loop:(10,9,8,...,1)***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=10; i>=1; i--){
System.out.println(i);
}
}
}

****For Loop:(10,8,6,4,2)***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=10; i>=1; i=i-2){
System.out.println(i);
}
}
}

****While Loop:***
package beginnerjava;
public class WhileloopDemo {
public static void main(String[] args) {
int i=1;
while(i<=10){
System.out.println("Bangladesh");
i++;
}
}
}

****While loop***
package beginnerjava;
public class WhileloopDemo {
public static void main(String[] args) {
int i=1;
while(i<=10){
System.out.println(i+".Bangladesh");
i++;
}
}
}

****While Loop:1-100***
package beginnerjava;
public class WhileloopDemo {
public static void main(String[] args) {
int i=1;
while(i<=100){
System.out.println(i);
i++;
}
}
}

****While Loop:2,4,6,...,100***
package beginnerjava;
public class WhileloopDemo {
public static void main(String[] args) {
int i=2;
while(i<=100){
System.out.println(i);
i=i+2;
}
}
}

****While Loop:1,3,5,7,....,99***
package beginnerjava;
public class WhileloopDemo {
public static void main(String[] args) {
int i=1;
while(i<=100){
System.out.println(i);
i=i+2;
}
}
}
****Do While Loop:***
package beginnerjava;
public class DowhileloopDemo {
public static void main(String[] args) {
int i=1;
do{
System.out.println("Bangladesh");
i++;
}while(i<=10);
}
}

****Do While Loop:1-100***
package beginnerjava;
public class DowhileloopDemo {
public static void main(String[] args) {
int i=1;
do{
System.out.println(i);
i++;
}while(i<=100);
}
}

****Do While Loop:2,4,6,...,100***
package beginnerjava;
public class DowhileloopDemo {
public static void main(String[] args) {
int i=2;
do{
System.out.println(i);
i=i+2;
}while(i<=100);
}
}

****Do While Loop:1,3,5,7,...,99***
package beginnerjava;
public class DowhileloopDemo {
public static void main(String[] args) {
int i=1;
do{
System.out.println(i);
i=i+2;
}while(i<=100);
}
}

****Do While Loop:Wrong condition Print only one times do while loops***
package beginnerjava;
public class DowhileloopDemo {
public static void main(String[] args) {
int i=6;
do{
System.out.println("Bangladesh");
i=i++;
}while(i<=5);
}
}

****Use break(For Loop)***
package beginnerjava;
public class ForloopDemo {
public static void main(String[] args) {
for(int i=1; i<=100; i++){
if(i==10){
break;
}
System.out.println(i);
}
}
}

****Use continue: 10 can't print***
package beginnerjava;
public class ContinueDemo {
public static void main(String[] args) {
for(int i=1; i<=100; i++){
if(i==10){
continue;
}
System.out.println(i);
}
}
}

****Use continue:10 to 90 can't print***
package beginnerjava;
public class ContinueDemo {
public static void main(String[] args) {
for(int i=1; i<=100; i++){
if(i>=10 && i<=90){
continue;
}
System.out.println(i);
}
}
}

****Continue and break(10 to 60 and after 90 can't print)***
package beginnerjava;
public class ContinueBreak {
public static void main(String[] args) {
for(int i=1; i<=100; i++){
if(i>=10 && i<=60){
continue;
}
System.out.println(i);
if(i==90){
break;
}
}
}
}

****sum:1-10***
package beginnerjava;
public class MathDemo {
public static void main(String[] args) {
int sum=0;
for (int i = 1; i <= 10; i++) {
sum=sum+i;
}
System.out.println("sum of first ten Natural number is= "+sum);
}
}

*******
package beginnerjava;
import java.util.Scanner;
public class MathDemo {
public static void main(String[] args) {
int m,n,sum=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter initial Number =");
m=input.nextInt();
System.out.print("Enter final Number =");
n=input.nextInt();
for (int i=m; i<=n; i++){
sum = sum+i;
}
System.out.println("sum is= "+sum);
}
}

****Add even number user defined***
package beginnerjava;
import java.util.Scanner;
public class MathDemo {
public static void main(String[] args) {
int m,n,sum=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter initial Number =");
m=input.nextInt();
System.out.print("Enter final Number =");
n=input.nextInt();
for (int i=m; i<=n; i++){
if(i%2==0){
sum = sum+i;
}
}
System.out.println("sum is= "+sum);
}
}

****Add even number user defined***
package beginnerjava;
import java.util.Scanner;
public class MathDemo {
public static void main(String[] args) {
int m,n,sum=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter initial Number =");
m=input.nextInt();
System.out.print("Enter final Number =");
n=input.nextInt();
for (int i=m; i<=n; i++){
if(i%2==0){
sum = sum+i;
System.out.println(" "+i);
}
}
System.out.println("sum is= "+sum);
}
}

****Add odd number user defined***
package beginnerjava;
import java.util.Scanner;
public class MathDemo {
public static void main(String[] args) {
int m,n,sum=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter initial Number =");
m=input.nextInt();
System.out.print("Enter final Number =");
n=input.nextInt();
for (int i=m; i<=n; i++){
if(i%2 !=0){
sum = sum+i;
}
}
System.out.println("sum is= "+sum);
}
}

****Add odd number user defined***
package beginnerjava;
import java.util.Scanner;
public class MathDemo {
public static void main(String[] args) {
int m,n,sum=0;
Scanner input=new Scanner(System.in);
System.out.print("Enter initial Number =");
m=input.nextInt();
System.out.print("Enter final Number =");
n=input.nextInt();
for (int i=m; i<=n; i++){
if(i%2 !=0){
sum = sum+i;
System.out.println(" "+i);
}
}
System.out.println("sum is= "+sum);
}
}

****Add series:1+2+3+......+n=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,sum=0;
System.out.print("Enter the last number= ");
n=input.nextInt();
for (int i = 1; i <=n; i++) {
sum=sum+i;
System.out.print(" + "+i);
}
System.out.println(" = "+sum);
}
}

****Add series:1+3+5+......+(2n+1)=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,sum=0;
System.out.print("Enter the last number= ");
n=input.nextInt();
for (int i = 1; i <=n; i=i+2) {
sum=sum+i;
System.out.print(" + "+i);
}
System.out.println(" = "+sum);
}
}

****Add series:2+4+6+......+2n=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,sum=0;
System.out.print("Enter the last number= ");
n=input.nextInt();
for (int i = 2; i <=n; i=i+2) {
sum=sum+i;
System.out.print(" + "+i);
}
System.out.println(" = "+sum);
}
}

****1.5+2.5+3.5+... ... ...***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
double n,sum=0;
System.out.print("Enter the last number= ");
n=input.nextDouble();
for (double i = 1.5; i <=n; i=i+1) {
sum=sum+i;
System.out.print(" + "+i);
}
System.out.println(" = "+sum);
}
}

****1^2 +2^2 +3^2+4^2... ... ...+n^2=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,sum=0;
System.out.print("Enter the last number= ");
n=input.nextInt();
for (int i = 1; i <=n; i=i+1) {
sum=sum+i*i;
System.out.print("+"+" "+i+"x"+i+" ");
}
System.out.println(" = "+sum);
}
}

****1^3+2^3+3^3+4^3+...............+n^3=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,sum=0;
System.out.print("Enter the last number= ");
n=input.nextInt();
for (int i = 1; i <=n; i=i+1) {
sum=sum+i*i*i;
System.out.print("+"+" "+i+"x"+i+"x"+i" ");
}
System.out.println(" = "+sum);
}
}

****Factorial***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,factorial=1;
System.out.print("Enter the number= ∟");
n=input.nextInt();
for (int i = 1; i <=n; i=i+1) {
factorial=factorial*i;
System.out.print("x"+i);
}
System.out.println(" = "+factorial);
}
}

****Factorial***
package beginnerjava;
import java.util.Scanner;
public class FactorialDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int num,factorial=1;
System.out.print("Enter the integer number= ∟");
num=input.nextInt();
for (int i = num; i >=1; i--) {
factorial=factorial*i;
System.out.print("x"+i);
} System.out.println(" = "+ factorial);
}
}

****1*3*5*7*...........*(2n+1)=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,result=1;
System.out.print("Enter the last odd number =");
n=input.nextInt();
for (int i = 1; i <=n; i=i+2) {
result=result*i;
System.out.print("x"+i);
}
System.out.println(" = "+result);
}
}

****1^2*3^2*5^2.......(2n+1)^2=***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,result=1;
System.out.print("Enter the last odd number =");
n=input.nextInt();
for (int i = 1; i <=n; i=i+2) {
result=result*i*i;
System.out.print("x"+"("+i+"x"+i+")");
}
System.out.println(" = "+result);
}
}

****1^3*3^3*5^3*7^3*........*(2n+1)^3=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,result=1;
System.out.print("Enter the last odd number =");
n=input.nextInt();
for (int i = 1; i <=n; i=i+2) {
result=result*i*i*i;
System.out.print("x"+"("+i+"x"+i+"x"+i+")");
}
System.out.println(" = "+result);
}
}

****2^2*4^2*6^2.......(2n)^2=***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,result=1;
System.out.print("Enter the last odd number =");
n=input.nextInt();
for (int i = 2; i <=n; i=i+2) {
result=result*i*i;
System.out.print("x"+"("+i+"x"+i+")");
}
System.out.println(" = "+result);
}
}

****37. 2^3*4^3*6^3*8^3*........*(2n)^3=?***
package beginnerjava;
import java.util.Scanner;
public class SeriesDemo {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int n,result=1;
System.out.print("Enter the last odd number =");
n=input.nextInt();
for (int i = 2; i <=n; i=i+2) {
result=result*i*i*i;
System.out.print("x"+"("+i+"x"+i+"x"+i+")");
}
System.out.println(" = "+result);
}
}

****38.Namta***
package beginnerjava;
import java.util.Scanner;
public class TimeTable {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int num;
System.out.println("Enter an integer number= ");
num=input.nextInt();
for (int i = 1; i <=10; i++) {
System.out.println(num+"x"+i+" = "+num*i);
}
}
}

****38.Nested loop***
package beginnerjava;
import java.util.Scanner;
public class TimeTable {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int m,n;
System.out.print("Enter initial number= ");
m=input.nextInt();
System.out.print("Enter final number= ");
n=input.nextInt();
for (int i = m; i <=n; i++) {
for (int j = 1; j <=10; j++) {
System.out.println(i+"x"+j+" = "+i*j);
}
System.out.println("\n");
}
}
}

****39.Identify Prime Number***
package beginnerjava;
import java.util.Scanner;
public class PrimeNumber {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter any positive integer number= ");
int num;
num=input.nextInt();
int count=0;
for (int i = 2; i < num; i++) {
if(num%i==0){
count++;
break;
}
}
if(count==0){
System.out.println("Prime number!");
}else{
System.out.println("Is not Prime number");
}
}
}
****40.Find Prime number between m & n***
package beginnerjava;
import java.util.Scanner;
public class PrimeNumber {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int m,n,count=1;
System.out.print("Enter initial number= ");
m=input.nextInt();
System.out.print("Enter final number= ");
n=input.nextInt();
for (int i = m; i <=n; i++)
{ for (int j = 2; j <=i-1; j++) {
if(i%j==0)
{
count++;
break;
}
}
if(count==0)
System.out.print("("+i+")"+",");
count=0;
}
System.out.println(); }
}

****41.Fibonakki Numbers(0,1,1,2,3,5,8,13... ....)***
package beginnerjava;
import java.util.Scanner;
public class FibonakkiSeries {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("How many integers you want?= ");
int n=input.nextInt();
int first=0;
int second=1;
int fibonakki;
System.out.print(first+","+second);
for (int i = 3; i <=n; i++) {
fibonakki=first+second;
System.out.print(","+fibonakki);
first=second;
second=fibonakki;
}
System.out.println();
}
}

****42.Sum of digits(456->4+5+6=15)***
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int sum=0,r,temp,num;
System.out.print("Enter any number= ");
num=input.nextInt();
temp=num;
while(temp !=0){
r=temp%10;
sum=sum+r;
temp=temp/10;
}
System.out.println("Sum of digits= "+sum);
}
}

****45.Reverse an Integer(456->654)***
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int sum=0,r,temp,num;
System.out.print("Enter any number= ");
num=input.nextInt();
temp=num;
while(temp !=0){
r=temp%10;
sum=sum*10+r;
temp=temp/10;
}
System.out.println("Sum of digits= "+sum);
}
}

****Palindrom/Not palindrom(12344321)***
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int sum=0,r,temp,num;
System.out.print("Enter any number= ");
num=input.nextInt();
temp=num;
while(temp !=0){
r=temp%10;
sum=sum*10+r;
temp=temp/10;
}
System.out.println("Sum of digits= "+sum);
if(num==sum){ System.out.println("Palindrom number ");
}else{
System.out.println("Not palindrom number");
}
}
}

****47. Armstrong(153=1^3+5^3+3^3=153)***
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
int sum=0,r,temp,num;
System.out.print("Enter any number= ");
num=input.nextInt();
temp=num;
while(temp !=0){
r=temp%10;
sum=sum+r*r*r;
temp=temp/10;
}
if(num==sum){
System.out.println("Armstrong number");
}else{
System.out.println("Not armstrong number");
}
}
}

****Pattarn***
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in); System.out.print("Enter line number= ");
int n=input.nextInt();
for (int row = 1; row <=n; row++) {
for (int col= 1; col<= row; col++) {
System.out.print(" "+col);
}
System.out.println();
}
}
}
*******
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter line number= ");
int n=input.nextInt();
for (int row = 1; row <=n; row++) {
for (int col= 1; col<= row; col++) {
System.out.print(" "+row);
} System.out.println();
}
}
}

*******
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter line number= ");
int n=input.nextInt();
for (int row = 1; row <=n; row++) {
for (int col= 1; col<= row; col++) {
System.out.print("* ");
}
System.out.println();
}
}
}

****rightangle Triangle***
package beginnerjava;
import java.util.Scanner;
public class SumDigits {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.print("Enter line number= ");
int n=input.nextInt();
for (int row = n ; row >=1; row--) {
for (int col= 1; col<= row; col++) {
System.out.print(" "+col);
}
System.out.println();
}
}
}

****Initialization, declerazition and print***
package ArrayDemo;
public class Array1 {
public static void main(String[] args) {
int [] number = new int[5];
number[0]=10;
number[1]=20;
number[2]=30;
number[3]=40;
number[4]=50;
System.out.println(number[3]);
}
}

****Size/length of array
package ArrayDemo;
public class Array1 {
public static void main(String[] args) {
int [] number = new int[5];
number[0]=10;
number[1]=20;
number[2]=30;
number[3]=40;
number[4]=50;
int len=number.length;
System.out.println("Array size= "+len);
}
}

****Sum of numbers using array***
package ArrayDemo;
public class Array1 {
public static void main(String[] args) {
int [] number = new int[5];
number[0]=10;
number[1]=20;
number[2]=30;
number[3]=40;
number[4]=50;
int len=number.length;
System.out.println("Array size= "+len);
int sum=number[0]+number[1]+number[2]+number[3]+number[4];
System.out.println("Sum on numbers= "+sum);
}
}

****Get of five decimal numbers from user and sum using array***
package ArrayDemo;
import java.util.Scanner;
public class Array1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
double []number = new double[5];
double sum=0;
System.out.print("Please Enter five decimal numbers= ");
number[0]=input.nextDouble();
number[1]=input.nextDouble();
number[2]=input.nextDouble();
number[3]=input.nextDouble();
number[4]=input.nextDouble();
sum=number[0]+number[1]+number[2]+number[3]+number[4];
System.out.println("Sum is= "+sum);
}
}

****Sum five decimal number using for loop in array***
package ArrayDemo;
import java.util.Scanner;
public class Array1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
double []number = new double[5];
double sum=0;
System.out.print("Please Enter five decimal numbers= ");
for (int i = 0; i <=5-1; i++) {
number[i]=input.nextDouble();
}
sum=number[0]+number[1]+number[2]+number[3]+number[4];
System.out.println("Sum is= "+sum);
for (int i = 0; i <=5-1; i++) {
sum = sum + number[i];
}
}
}

****Sum five decimal numbers using for loop in arry***
package ArrayDemo;
import java.util.Scanner;
public class Array1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
double []number = new double[5];
double sum=0;
System.out.print("Please Enter five decimal numbers= ");
for (int i = 0; i <=5-1; i++) {
number[i]=input.nextDouble();
}
for (int i = 0; i <=5-1; i++) {
sum = sum + number[i];
} System.out.println("Sum is= "+sum);
System.out.println("The avarage is= "+sum/5);
}
}

*******
package ArrayDemo;
import java.util.Scanner;
public class Array1 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
double []number = new double[10];
double sum=0;
System.out.print("Please Enter ten decimal numbers= ");
for (int i = 0; i <=number.length-1; i++) {
number[i]=input.nextDouble();
}
for (int i = 0; i <=number.length-1; i++) {
sum = sum + number[i];
}
System.out.println("Sum is= "+sum);
double Avg=sum/number.length;
System.out.println("The avarage is= "+Avg);
}
}

****Multi dimentional Array***
package local_global_instance;
import java.util.*;
public class ArrayDemo {
public static void main(String[] args) {
int a[][]=new int[3][];
a[0]=new int[3];
a[1]=new int[3];
a[2]=new int[3];
int arr[][] = {{20,10,30},{5,38,24},{43,77,88}};
for (int i = 0; i <=arr.length-1; i++) {
for (int j = 0; j <= arr[i].length-1; j++) {
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
}
}

****Row and Column***
package ArrayDemo;
import java.io.*;
public class Array1 {
public static void main(String[]args){
int [][] number = new int [4][5];
int k=0;
//Assign value
for (int i = 0; i <= 4-1; i++) {
for (int j = 0; j <= 5-1; j++) {
number [i][j]= k;
k++;
}
}
//print value
for (int i = 0; i <= 4-1; i++) {
for (int j = 0; j <= 5-1; j++) {
System.out.print(" "+number [i][j]);
}
System.out.println("\n");
}
}
}

****Rightangle Triangle***
package ArrayDemo;
import java.io.*;
public class Array1 {
public static void main(String[]args){
int [][] number = new int [4][];
number[0]=new int[1];
number[1]=new int[2];
number[2]=new int[3];
number[3]=new int[4];
int k=0;
//Assign value
for (int i = 0; i <=4-1; i++) {
for (int j = 0; j <=i; j++) {
number [i][j]= k;
k++;
}
}
//print value
for (int i = 0; i <= 4-1; i++) {
for (int j = 0; j <=i+1-1; j++) {
System.out.print(" "+number [i][j]);
}
System.out.println("\n");
}
}
}
****Ascending and Descending***
package ArrayDemo;
import java.io.*;
import java.util.Arrays;
public class Array1 {
public static void main(String[]args){
int [] number={10,-3,18,5,25};
Arrays.sort(number);
System.out.println("Ascending:");
for (int i = 0; i <=4; i++) {
System.out.print(", "+number[i]);
}
System.out.println("\n");
System.out.println("Descending:");
for (int i = 4; i>=0; i--) {
System.out.print(", "+number[i]);
}
System.out.println("\n");
}
}

****ArrayList***
package ArrayDemo;
import java.util.ArrayList;
public class Array1 {
public static void main(String[]args){
ArrayList number=new ArrayList();
//Adding element
number.add(10);
number.add(10);
number.add(20);
number.add(30);
number.add(40);
number.add(5, 50);
number.add(6, 60);
number.add(7, 70);
number.add(8, 80);
System.out.println(number);
System.out.println("Size="+number.size());
}
}
****Arraylist using Iterator***
package ArrayDemo;
import java.util.ArrayList;
import java.util.Iterator;
public class Array1 {
public static void main(String[]args){
ArrayList number=new ArrayList();
//Adding element
number.add(10);
number.add(10);
number.add(20);
number.add(30);
number.add(40);
number.add(5, 50);
number.add(6, 60);
number.add(7, 70);
number.add(8, 80);
Iterator itr=number.iterator();
while(itr.hasNext()){
System.out.print(", "+ itr.next());
}
System.out.println();
System.out.println("Size="+number.size());
}
}

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