strlen(3)                                                     strlen(3)

  strlen()

  NAME

    strlen() - find length of string

  SYNOPSIS

    #include 

    size_t strlen (const char *s)

  DESCRIPTION

    The strlen(3) function computes the length of the string s.

  RETURN VALUES

    The strlen(3) function returns the number of characters that precede the
    terminating NUL character.

  USAGE NOTES

    The strlen function is thread safe.

    The strlen function is not async-signal safe.