C Program to Reverse a Number
C Program to Reverse a Number
Posted By Manisha Gupta
Example to reverse an integer entered by the user. This problem is solved using while loop in this example.
To understand this example, you should have the knowledge of following C programming topics:
Example: Reverse an Integer
#include <stdio.h>
int main()
{
int n, reversedNumber = 0, remainder;
printf("Enter an integer: ");
scanf("%d", &n);
while(n != 0)
{
remainder = n%10;
reversedNumber = reversedNumber*10 + remainder;
n /= 10;
}
printf("Reversed Number = %d", reversedNumber);
return 0;
}
Output
Enter an integer: 12345 Reversed Number = 54321
This program takes an integer input from the user. Then the while loop is used until
n != 0is false.
In each iteration of while loop, the remainder when n is divided by 10 is calculated and the value of n is reduced by times.
