In this program we will learn to reverse any number wsing for loop and while loop.
Ex: 12345 -> 54321
Method 1: Reverse a Number using a while loop in Java
public class ReverseNumber { public static void main(String[] args) { int num = 1234, reversed = 0; while(num != 0) { int digit = num % 10; reversed = reversed * 10 + digit; num /= 10; } System.out.println("Reversed Number: " + reversed); } }
Output:
Reversed Number: 4321
Method 2: Reverse a number using a for loop in Java
public class ReverseNumber { public static void main(String[] args) { int num = 1234567, reversed = 0; for(;num != 0; num /= 10) { int digit = num % 10; reversed = reversed * 10 + digit; } System.out.println("Reversed Number: " + reversed); } }
Output
Reversed Number: 7654321
