Java Program to Reverse a Number

In this Java Video Tutorial you will learn How to Write a Program to Reverse a Number entered by the user.

Here we ask the user to enter a number and then we separate each digits from that number, and generate the number which will be the reverse of the given number.

This program can help a beginner in Computer Programming to understand how to construct the logic, How to use loops effectively.

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[AdrianTregoning]

Best explanation I've seen now. Thank you.

[dudem]

THANK YOU!!! this is the only video i found that explains this problem!! thanks sir (edit: i found many videos that just show you the code but don't say anything about how it works).

[paramgandhi]

how can we do this with for loop? as we have to mention the initial value and then increment or decrement too

[Anil_Y_channel]

Very good explanation i understand easily through ur bref explanation.thank you Very much

[rstikh]

thanks! you're amazing at explaining :)

[nsnikhil]

public class exercise {
public static void main(String[] args)
{
int remainder, revNumber = 0;
Scanner sc = new Scanner(System.in);
System.out.println("Enter a three digit number(100 to 999)");
int number = sc.nextInt();

if (number > 99 && number < 1000) {
while (number > 0) {
remainder = number % 10;
number = number / 10;
revNumber = (revNumber * 10) + remainder;
}

}
else {
System.out.println("It is not a three digit number");
System.exit(0);

}
}