Java Program to Reverse Two Numbers and Find Their Sum

Learn how to reverse two numbers and find their sum in Java. In this program, a while loop is used to reverse each number by extracting its digits one by one using the modulus (%) operator

Code Explanation (Step-by-Step)

Initialize two numbers: 123 and 456.
Reverse the first number using a while loop.
Reverse the second number using another while loop.
Use the modulus operator (% 10) to extract each digit.
Multiply the reversed number by 10 and add the extracted digit.
Divide the original number by 10 to process the next digit.
Add both reversed numbers.
Print the final sum.

				
					public class ReverseThenSum {

    public static void main(String[] args) {

        int i = 123;
        int j = 456;

        int reverseOne = 0;
        int reverseTwo = 0;

        while (i != 0) {
            int n = i % 10;
            reverseOne = reverseOne * 10 + n;
            i /= 10;
        }

        while (j != 0) {
            int m = j % 10;
            reverseTwo = reverseTwo * 10 + m;
            j /= 10;
        }

        int reverseSum = reverseOne + reverseTwo;

        System.out.println("Sum of reversed numbers: " + reverseSum);
    }
}

Output :-
Sum of reversed numbers: 975

Java Example Using While Loop

				
					public class ReverseThenSum {

    public static void main(String[] args) {

        int num1 = 123;
        int num2 = 456;

        int reverseOne = reverseNumber(num1);
        int reverseTwo = reverseNumber(num2);

        int sum = reverseOne + reverseTwo;

        System.out.println("First Reversed Number: " + reverseOne);
        System.out.println("Second Reversed Number: " + reverseTwo);
        System.out.println("Sum of Reversed Numbers: " + sum);
    }

    public static int reverseNumber(int number) {

        int reverse = 0;

        while (number > 0) {
            reverse = reverse * 10 + (number % 10);
            number /= 10;
        }

        return reverse;
    }
}

Output :-
Sum of reversed numbers: 975

Here are some Java-related programs that will help you understand Java concepts better:

Java Example Using While Loop

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