Java Program to Swap Two Numbers

In this program we are going to Swap Two Numbers

public class SwapNumbers {

    public static void main(String[] args) {

        float first = 1.20f, second = 2.45f;

        System.out.println("Before swap:");
        System.out.println("First number = " + first);
        System.out.println("Second number = " + second);

        // Value of first is assigned to temporary
        float temporary = first;

        // Value of second is assigned to first
        first = second;

        // Value of temporary (which contains the initial value of first) is assigned to second
        second = temporary;

        System.out.println("After swap:");
        System.out.println("First number = " + first);
        System.out.println("Second number = " + second);
    }
}

What You get as Output , After running the program

Before swap:
First number = 1.2
Second number = 2.45
After swap:
First number = 2.45
Second number = 1.2