C Program to Reverse a Number Using FOR Loop | C Programs

Write a program using FOR Loop to reverse the digits of the number. Write a c program to reverse a number using For Loop. Ex. if you enter 123456789 then the reverse number will be 987654321. All of you know better how to reverse a given number! Reversed number is a number written by reversing the order of digits. The first digit becomes the last and vice versa.

Read: Reverse a Number in C++

C Program to Reverse a Number Using FOR Loop

#include<stdio.h>

int main() {

  /*C Program to Reverse a Number Using FOR Loop*/
  int number, reminder, reverse = 0;

  printf("Enter Any Number to be Reversed :\n");

  scanf("%d", & number);

  for (; number != 0; number = number / 10) {

    reminder = number % 10;

    reverse = reverse * 10 + reminder;

  }

  printf("\nReverse a Number is : %d", reverse);

  return (0);

}

C Program to Reverse a Number Using While Loop

#include<stdio.h>

int main() {

  /*C Program to Reverse a Number Using WHILE Loop*/
  int number, reminder, reverse = 0;

  printf("Enter Any Number to be Reversed :\n");

  scanf("%d", & number);

  while (number >= 1) {
    reminder = number % 10;
    reverse = reverse * 10 + reminder;
    number = number / 10;
  }

  printf("\nReverse a Number is : %d", reverse);

  return (0);

}

The Logic of Reverse a Number

Let's take an example to understand How to Reverse a Number in C. The logic for reversing a digit is very simple. Let's understand by taking an example 12345. Now divide a number by 10, so we get the remainder of 5. Store the remainder in the variable and then and using this logic we multiply Reverse = Reverse * 10 + Remainder, again divide the number by 10, now the number is 1234 and repeat the process again and again until the number becomes greater or equal to 1.

How to Reverse a Number in C

Here are the five steps to Reverse a Number in C Programming Language.

1. First, take a number and store it in the variable.
2. Now divide the number by 10 and store the remainder in another variable.
3. Take a third variable and multiply by 10 and add the remainder.
4. Again divide the number by 10, Now the number is divisible by 10 Until the Number becomes greater or equal by 1.
5. Repeat the process again and again.

The Output of C Program to Reverse a Number

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