Java Program to Swap Two Numbers Without using the Third Variable1 min read

This post covers the Java Program to swap two numbers without using the third variable.
It is easy to swap two numbers using the third variable, we assigned one to a temporary(temp) variable and swap with to others.

Now let us see without using the third variable.


Explanation:
With the help of a Scanner class, we take the user input for two integers (a = 5, b = 3).
Now during the process of swapping, we assigned the value of a equal to the sum of a and b that is,
a = a + b;
(a = 5+3 = 8).

Second, we assigned the value of b equal to the difference between a and b that is,
b = a - b
(b= 8 – 3 = 5).

Lastly, we assigned the value of a equal to the difference between a and b that is,
a = a - b
(a= 8 – 5 = 3).

Then print those swapped values as shown in the program below.


Example: Java program to swap two numbers without using Third Variable.

Output:


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