Reverse a Number in C

#include <stdio.h>
int main() {
    int num, rev = 0, remainder;
    printf("Enter an integer: ");
    scanf("%d", &num);
    while (num != 0) {
        remainder = num % 10;
        rev = rev * 10 + remainder;
        num /= 10;
    }
    printf("Reversed number = %d", rev);
    return 0;
}

Enter an integer: 9876467
Reversed number = 7646789

• This program is used to calculate the reverse of a number.
• In main(), the program requests the user to enter a number and stores it in a integer variable n using the scanf() function.
• The integer variable rev is initialized as rev = 0.
• A while loop is initialized which will continue until num != 0 is true.
• The remainder of num is calculated by taking modulus of num with 10.
• The reverse of num is calculated by using the formula rev * 10 + remainder.
• In each iteration, the value of num is reduced 10 times by dividing num by 10 which will be the value used in the next iteration.
• When num becomes equal to 0, the loop exits, and the reverse number is printed.
• The return 0 statement is used to exit the program execution.