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.

In this program, you'll learn to reverse a number using a while loop and a for loop in Java.

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.

Mar 10, 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.

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.

Mar 17, 2025 · There are three ways to reverse a number in Java: Reverse a number using while loop; Reverse a number using for loop; Reverse a number using recursion; Let's apply the above steps in an example. Example. Suppose, we want to reverse the number 1234.

Apr 29, 2017 · Can anyone explain to me how to reverse an integer without using array or String. I got this code from online, but not really understand why + input % 10 and divide again. reversedNum = reversedNum * 10 + input % 10; input = input / 10; . And how to do use this sample code to reverse only odd 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.

Jan 8, 2024 · In this tutorial, we’ll see how to reverse a number using a mathematical approach in Java. First, we’ll see what math operations are necessary for doing this, and then we’ll go through three different ways of implementing this.

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.