Write a java program to swap a two integer without using a Temporary Third variable

Program :

class Swap1

{

    public static void main(String[] args) {

       

        int x = 5 ;

        int y = 7 ;

        x = x +  y ;

        y =  x - y ;

        x = x - y ;

        System.out.println("After Swapping " +x);

        System.out.println("Before Swapping " +y);

    }

}

Output :

Write a java program to swap a two integer using third variable Temporary.

Program :

class Swap

{

    public static void main(String[] args) {

       

        int x = 5 ;

        int y = 7 ;

        int temp ;

        temp = x ;

        x = y ;

        y = temp ;

        System.out.println("After Swapping " +x);

        System.out.println("Before Swapping " +y);

    }

}

Output :

write a java program to demonstrate increment and decrement Operator

 Program :

class IncDec

{

    public static void main(String[] args) {

        int a , b ;

        a = 2 ;

        b = 3 ;

        a++ ;

        ++a ;

        System.out.println("Value of after increment " +a) ;

        --b ;

        b-- ;

        System.out.println("Value of after decrement " +b) ;

    }
}


Output :

Write a java program to find the greatest among Three Number

 Program :

class GreatestThree

{

    public static void main(String[] args) {

        int x = 5 , y = 7 , z = 9 ;

if(x > y && x > z)

System.out.println("x is Greatest");

else

            if(y > x && y > z)

System.out.println("Y is Greatest");

else

System.out.println("Z is Greatest");   

        }

    }

Output :

write a java program to demonstrate used of Math Function exp()

 Program :

import java.lang.Math ;

public class Expo

{

    public static void main(String[] args) {

        System.out.println("Exponential       Value of 709.7822 is"+Math.exp(709.7822)) ;

    }

}

Output :

write a java program to accept the value of radius from user and calculate area of circle and display it using Scanner class.

Program :

import java.util.Scanner;

class Circle

{

    public static void main(String[] args) {

        double rad , a ;

Scanner sc = new Scanner (System.in) ;

System.out.println(" Enter Radius : ");

        rad = sc.nextFloat();

a = 3.14 * rad * rad;

        System.out.println("Area of Circle is  : "+a);

    }

}

Output :

Write a java Program to perform basic Arithmatic Operation using Arithmatic Operator

Program :

class Arithmatic

{

    public static void main(String[] args) {

        int a = 5 , b = 2 ;

        int sum , sub , mul , mod ;

        float div ;

        sum = a + b ;

        System.out.println("Sum is "+sum);

sub = a - b ;

        System.out.println("Subtraction is " +sub);

mul = a * b ;

        System.out.println("Multiplication is " +mul);

div = a / b ;

        System.out.println("Division is "+div);

mod = a % b ;

        System.out.println("Mod is "+mod);

           }

}

Output :

write a java program to demonstrate used of Math Function abs()

Program :

import java.lang.Math ;

public class Absolute

{

    public static void main(String[] args) {

        int x = -2 ;

        System.out.println("original Value = " +x) ;

System.out.println("Absolute Value = " +Math.abs(x));

}

}

Output :

Write a java program to calculate sum of digit .

Program :

class Sum

{

public static void main(String[] args) {

int x = 123 , Sum = 0 ;

int rem ;

while(x>0)

{

rem = x%10 ;

Sum = Sum + rem ;

x = x/10 ;

}

System.out.println("Sum is "+Sum);

}

}

Output :

Write a java program to calculate SquareRoot of a given number.

Program :

import java.lang.Math;

class SquareRoot

{

public static void main(String[] args) {

               double x = 5 ;

               double y ;

               y = Math.sqrt(x);

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

}

}

Output :

write a java program to check the given No is Prime or Not.

Program :

class Prime

{

public static void main(String[] args) {

int n = 7 , i = 1 , count = 0 ;

do

{

if (n % i == 0) 

count++ ;

i++ ;

}while( i<=n);

if (count == 2 ) 

System.out.println("It is a Prime Number ");

else

System.out.println("It is not a Prime Number ");

          }

}

Output :

write a java program to check the given number is palindrome or not.

Program :

class Palindrome

{

public static void main(String[] args) {

int n = 123 ;

int p = n , s = 0 ;

while(n>0)

{

int z  = n%10 ;

s = (s*10) + z ;

n = n/10 ;

}

if (s == p)

System.out.println("It is a Palindrome " +s);

System.out.println("It is not a Palindrome " +s);

}

}

Output :

write a java program to find the greatest number among 2 digit.

program :

class Greatest

{

public static void main(String[] args) {

int x = 5 ;

int y = 7 ;

if (x > y ) {

System.out.println(" Greatest Number is " +x);

}

else{

System.out.println("Greatest Number is " +y);

}

}

}

Output :