March 4, 2003 ISWCTYPE 3

### NAME

iswctype - test a character for character class identifier

### LIBRARY

Standard C Library (libc, -lc)

### SYNOPSIS

```int` iswctype(```wint_t wc``, wctype_t charclass`)

### DESCRIPTION

The iswctype(``) function returns a boolean value that indicates whether a wide character ```wc` is in ```charclass`.

The behaviour of iswctype(``) is undefined if the iswctype(``) function is called with an invalid ```charclass` (changes of ```LC_CTYPE` category invalidate ```charclass`) or invalid wide character ```wc`.

The behaviour of iswctype(``) is affected by the ```LC_CTYPE` category of the current locale.

### RETURN VALUES

The iswctype(``) returns:

0
  ```wc` is not in ```charclass`.

non-zero
  ```wc` is in ```charclass`.

### ERRORS

No errors are defined.

### SEE ALSO

setlocale(3), towctrans(3), wctrans(3), wctype(3)

### STANDARDS

The iswctype(``) function conforms to ISO/IEC 9899/AMD1:1990 (``ISO C90'') .