islower, iswlower

intislower(intc**);**

intiswlower(wint_tc**);**

Each of these routines returns true if c is a particular representation of a lowercase character.

Routine	Required Header	Compatibility
islower	<ctype.h>	ANSI, Win 95, Win NT
iswlower	<ctype.h> or <wchar.h>	ANSI, Win 95, Win NT

For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB	Single thread static library, retail version
LIBCMT.LIB	Multithread static library, retail version
MSVCRT.LIB	Import library for MSVCRT.DLL, retail version

Return Value

islower returns a non-zero value if c is a lowercase character (a – z). iswlower returns a non-zero value if c is a wide character that corresponds to a lowercase letter, or if c is one of an implementation-defined set of wide characters for which none of iswcntrl, iswdigit, iswpunct, or iswspace is true. Each of these routines returns 0 if c does not satisfy the test condition.

The result of the test condition for the islower function depends on the LC_CTYPE category setting of the current locale; see setlocale for more information. For iswlower, the result of the test condition is independent of locale.

Parameter

c

Integer to test

Generic-Text Routine Mappings

TCHAR.H Routine	_UNICODE & _MBCS Not Defined	_MBCS Defined	_UNICODE Defined
_istlower	islower	_ismbclower	iswlower

Character Classification Routines |  Locale Routines |  is, isw Function Overview