Write a function to reverse a number. For example, if num = 1234, the expected output is 4321. Did you find this article helpful? In this program, you'll learn to reverse a number using a while loop and a for loop in Java.

Apr 8, 2025 · We can reverse a number in Java using three main methods as mentioned below: 1. Using While Loop. Simply apply the steps/algorithm discussed and terminate the loop when the number becomes zero. Example: The complexity of the above method: 2. Using Recursion. In recursion, the final reverse value will be stored in the global ‘rev’ variable.

Sep 15, 2022 · In this tutorial, you will learn how to reverse a number in Java. For example if a given input number is 19 then the output of the program should be 91. There are several ways to reverse a number in Java. We will mainly discuss following three techniques to reverse a number.

In this tutorial, we will learn how to write a Java program to reverse a number using a while loop and a for loop in Java. We will read input from the console using Scanner class.

Mar 17, 2025 · In this section, we will learn how to reverse a number in Java using while loop, for loop and recursion. First, we find the remainder of the given number by using the modulo (%) operator. Multiply the variable reverse by 10 and add the remainder into it. Divide the number by 10. Repeat the above steps until the number becomes 0.

Apr 25, 2025 · Reverse A Number In Java – We have discussed the various methods to reverse a number in Java program. To each and every program, compiler is added to execute the program. Along with it, sample outputs are also given citing various examples. The methods are: 1) Entered value will be assigned to n and res=0.

Step1 : Initialize a variable called “reversedNumber” to store the reversed number. Step2 : While the original number is greater than 0 , do the following: Find the remainder of the original number by using the modulo (%) operator. Multiply the “reversedNumber” variable …

temp = number % 10; //create reversed number . reversedNumber = reversedNumber * 10 + temp; . number = number / 10; } //output System. out.println("Reversed Number is: " + reversedNumber); } } This is a Java program which is used to find the reverse of a number.

Here is a program that reverse a number in Java using the while loop, for loop, and recursive approaches, along with a detailed explanation & examples.

How to write a Java Program to Reverse a Number using While Loop, For Loop, Built-in reverse function, Functions, and Recursion. With no direct approach, you must use logic to extract the last digit from the number, add it to the first position, and …