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 demonstrate used of Math Function pow()

Program :

import java.lang.Math ;

public class Power

{

    public static void main(String[] args) {

        double n1 = 2 , n2 = 3;

        System.out.println(+n1 + " ^ " + n2 + " = " +Math.pow(n1 , n2 ));

    }

}

Output :

write a java program to find the smallest of two value using Math Function min()

Program :

import java.lang.Math ;

public class Minimum

{

    public static void main(String[] args) {

        int n1 , n2 ;

n1 = 3 ;

n2 = 4 ;

        System.out.println("Manimum of " + n1 +" and " + n2 + " is " + Math.min(n1 , n2)) ;

    }

}

Output :

write a java program to find the largest of two value using Math Function max()

Program :

import java.lang.Math ;

public class Maximum

{

    public static void main(String[] args) {  

 

        int n1 , n2 ;

        n1 = 3 ;

        n2 = 4 ;

        System.out.println("Maximum of " + n1 +" and " + n2 + " is " + Math.max(n1 , n2)) ;

    }

}

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 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 :