Find the length of string in c with just one line of code without using strlen() function?

Question

I want to find if there is any way to find the length of any string in C.
Here's how I did:

#include <stdio.h>
int main()
{
    char s[10] = "hello";
    int i , len = 0;
    for(i = 0; s[i] != '\0'; i++)
    {
        len++
    }
    printf("length of string is: %d" , len);
    return 0;
}

I want to find, if there is any way to get the length of string in just one line of code.

Answer 1

You can just simply do this:

for(len = 0; s[len] != '\0'; len++);

So in just one line of code you will get the length of string stored in len.

Answer 2

You can remove s[len] != '\0'; comparison to make it shorter:

for(len=0;s[len];len++);