(C programming Example for Beginners)
C Program to Reverse a Number
In this example, you will learn to reverse the number entered by the user.
Reverse an Integer
#include <stdio.h>
int main(){
int n, rev = 0, remainder;
printf("Enter an integer: ");
scanf("%d", &n);
while (n != 0) {
remainder = n % 10;
rev = rev * 10 + remainder;
n /= 10;
}
printf("Reversed number = %d", rev);
return 0;
}
Output
Enter an integer: 2345 Reversed number = 5432
This program takes an integer input from the user. Then the while loop is used until n != 0 is false (0).
In each iteration of the loop, the remainder when n is divided by 10 is calculated and the value of n is reduced by 10 times.
Inside the loop, the reversed number is computed using:
rev = rev*10 + remainder;
C Example for Beginners: C Program to Reverse a Number
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