is that char null terminator is including in the length count

Question

#include 

int main(int argc, char *argv[]) {
   char s[]=\"help\";
   printf(\"%d\",strlen(s));  
}

Why the above output is 4, isn

Answer 1

It's 4.

strlen() counts the number of characters up to, but not including, the first char with a value of 0 - the nul terminator.