Reverse of a number without using loop in Java

In this section you will learn how to reverse the numbers in Java without using loop. We will use two variable for reverse the numbers and simple mathematic operation. In this program we are taking the input from user.

Reverse mean shifting the first value to last value and shifting the last value to first value.

Let’s suppose a user will input a number ‘134’, then we will perform reverse operation on it.

What is scanner function?

Scanner function is use to take the input from user in java.

How program will work?

• First import the scanner package at top of program.
• Second initialize two integer variable like (num, temp).
• Now perform reverse operation with both variable.
• Finally show the result on output screen after reverse.

Program of reverse the number in java without loop.

	import java.util.Scanner;

	class Reverse
	{
		public static void main(String arg[])
		{
			int num, temp;
			Scanner sc = new Scanner(System.in);
			System.out.println("ENTER THE FIRST NUMBER:-");
			num = sc.nextInt();
			System.out.println("BEFORE REVERSE VALUE IS:- "+num);
			System.out.print("AFTER REVERSE RESULT IS:- ");
			temp = num%10;
			System.out.print(temp);
			temp = num/10;
			temp = temp%10;
			System.out.print(temp);
			temp = num/10;
			temp = temp/10;
			System.out.print(temp);
		}
	}

Output:

	BEFORE REVERSE VALUE IS:- 134
	AFTER REVERSE RESULT IS:- 431