NAME
isrune —
valid character test
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include
<ctype.h>
int
isrune(int
c);
DESCRIPTION
The
isrune()
function tests for any character that is valid in the current character set.
In the ASCII character set, this is equivalent to
isascii().
RETURN VALUES
The isrune() function returns zero if the
character tests false and returns non-zero if the character tests true.
SEE ALSO
HISTORY
The isrune() function appeared in
4.4BSD.