sum of first and last digit of a number.

#include<stdio.h>
int  main()

{
    int num,fd,ld,sum=0;
    scanf("%d",&num);
    ld=num%10;

    while(num>=10)

    {
        num = num/10;
    }

    fd=num;
    sum=fd+ld;

    printf("first and last digit sum = %d\n",sum);
    return 0;
}