STRLEN(3) Linux Programmer's Manual STRLEN(3) NAME strlen - calculate the length of a string SYNOPSIS #include <string.h> size_t strlen(const char *s); DESCRIPTION The strlen() function calculates the length of the string s, not including the terminating `\0' character. RETURN VALUE The strlen() function returns the number of characters in s. CONFORMING TO SVID 3, POSIX, BSD 4.3, ISO 9899 SEE ALSO string(3) 1993-04-12 STRLEN(3)