isprint, iswprint, _isprint_l, _iswprint_l

Determines whether an integer represents a printable character.


int isprint(
   int c
int iswprint(
   wint_t c
int _isprint_l(
   int c,
   _locale_t locale
int _iswprint_l(
   wint_t c,
   _locale_t locale


Integer to test.

The locale to use.

Return value

Each of these routines returns nonzero if c is a particular representation of a printable character. isprint returns a nonzero value if c is a printable character (0x20 - 0x7E), including the space character. iswprint returns a nonzero value if c is a printable wide character, including the space wide character. Each of these routines returns 0 if c doesn't satisfy the test condition.

The result of the test condition for these functions depends on the LC_CTYPE category setting of the locale. For more information, see setlocale, _wsetlocale. The versions of these functions that don't have the _l suffix use the current locale for any locale-dependent behavior; the versions that do have the _l suffix are identical except that they use the locale that's passed in instead. For more information, see Locale.

The behavior of isprint and _isprint_l is undefined if c isn't EOF or in the range 0 through 0xFF, inclusive. When a debug CRT library is used and c isn't one of these values, the functions raise an assertion.

Generic-text routine mappings

TCHAR.H routine _UNICODE and _MBCS not defined _MBCS defined _UNICODE defined
_istprint isprint _ismbcprint iswprint


By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.


Routine Required header
isprint <ctype.h>
iswprint <ctype.h> or <wchar.h>
_isprint_l <ctype.h>
_iswprint_l <ctype.h> or <wchar.h>

For more compatibility information, see Compatibility.

See also

Character classification
is, isw routines