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
ctype(3), isascii(3), iswrune(3), ascii(7), isalnum_l
HISTORY
The isrune() function appeared in 4.4BSD.