strlen function using recursion in c

Question

I\'m kida new to the recursion subject and i\'ve been trying to write the \"strlen\" function using recurion, thats what i tried:

int strlen ( char str[], int i         


        

Answer 1

size_t strlen (char* str) {
    if (*str == 0) {
        return 0;
    }

    return strlen (str+1) +1;
}

So :

• strlen ("") == 0
• strlen ("a") -> strln("") + 1 == 1
• strlen ("he") -> strln("e") + 1) = (strln("") + 1) + 1 == 2

etc