```
#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;`