How do you swap two numbers without using third variable in java?

Swapping numbers without using a third variable is a three-step process thatâ€™s better visualized in code:

b = b + a; // now b is sum of both the numbers

a = b – a; // b – a = (b + a) – a = b (a is swapped)

b = b – a; // (b + a) – b = a (b is swapped)

The following example code shows one way to implement the numberÂ swapÂ method:

public class SwapNumbers {

public static void main(String[] args) {

int a = 10;

int b = 20;

System.out.println(“a is ” + a + ” and b is ” + b);

a = a + b;

b = a – b;

a = a – b;

System.out.println(“After swapping, a is ” + a + ” and b is ” + b);

}

}

The output shows that the integer values are swapped:

Output

a is 10 and b is 20

After swapping, a is 20 and b is 10

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