Name
strlen - calculate the length of a string
Synopsis
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#include <string.h>
size_t strlen(const char *s);
Description
The strlen() function calculates the length of the string pointed
to by s, excluding the terminating null byte (‘\0’). Note that
strlen() stops counting characters as soon as it encounters a
null byte.
Example
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#include <assert.h>
#include <string.h>
int main() {
char s[7] = "hello!";
assert(strlen(s) == 6);
}
Return Value
Upon completion, the strlen() function returns the number of characters
in the string pointed to by s.