Swap two numbers using java. Java swapping program.

In this article you will learn how to swap two numbers using third variable or without using third variable. 

To understand this example you should have knowledge about
Java datatypes, 
Java operator. 

Using third variable. 

Approach :-1

class Swapno{

    public static void main(String[] args) {
        int n1=15,n2=25,temp;

        System.out.println("Befor swapping n1 = "+n1+" n2= "+n2);

        temp=n1;
        n1=n2;
        n2=temp;

        System.out.println("After swapping n1 = "+n1+" n2= "+n2);
    }
}

Output :-

Befor swapping n1 = 15 n2= 25
After swapping n1 = 25 n2= 15

 Not using third variable 

Approach :-2

public class Swapno{
    public static void main(String[] args) {
        int n1=15,n2=25;
        System.out.println("Befor swapping n1 = "+n1+" n2= "+n2);

        n1=n1-n2;
        n2=n1+n2;
        n1=n2-n1;

        System.out.println("After swapping n1 = "+n1+" n2= "+n2);

    }

}

Output :-

Befor swapping n1 = 15 n2= 25
After swapping n1 = 25 n2= 15

Tags:

Swap two numbers in java

Swap two in java 

Swapping in java

Java program to swap two numbers. 

Java swapping program

Java swap

Swap in java