Sum of first and last digit of a number.

#include<stdio.h>
int main()
{
    int n, fd, ld, sum=0;
    printf("Enter the number:");
    scanf("%d", &n);
    ld=n%10;
    while (n>=10)
    {
        n=n/10;
    }
    fd=n;
    sum=fd+ld;
    printf("sum=%d", sum);
    return 0;
}