Find the length of a String with string.h in C.

#include <stdio.h>

#include<string.h>

int main()

{

    char str[100];

    int len,i=0;

    printf("Please Enter Massage: ");

    gets(str);

    len=strlen(str); /// string length function

    printf("
Your Massage Length is: %d
",len);

    return 0;

}