STRLEN(3)

STRLEN(3) | Library Functions Manual | STRLEN(3)

# NAME

`strlen`, `strnlen` —
find length of string

# LIBRARY

Standard C Library (libc, -lc)

# SYNOPSIS

`#include <string.h>`

size_t
`strlen`(const char *s);

size_t
`strnlen`(const char *s, size_t maxlen);

# DESCRIPTION

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

The `strnlen`() function attempts to compute the length of s, but never scans beyond the first maxlen bytes of s.

# RETURN VALUES

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

The `strnlen`() function returns either the same result as `strlen`() or maxlen, whichever is smaller.

# SEE ALSO

string(3), wcslen(3), wcswidth(3)

# STANDARDS

The `strlen`() function conforms to ISO/IEC 9899:1990 (“ISO C90”). The `strnlen`() function conforms to IEEE Std 1003.1-2008 (“POSIX.1”).

May 1, 2009 | NetBSD 9.5