islower, iswlower, _ismbclower
Remonter à Ctype.h - Index
Header File
ctype.h, mbstring.h
Category
Classification Routines
Prototype
int islower(int c);
int iswlower(wint_t c);
int _ismbclower(unsigned int c);
Description
Tests for lowercase character.
islower is a macro that classifies ASCII-coded integer values by table lookup. The macro is affected by the current locale’s LC_CTYPE category. For the default C locale, c is a lowercase letter (a to z).
You can make this macro available as a function by undefining (#undef) it.
Return Value
islower returns nonzero if c is a lowercase letter.
Example
#include <stdio.h>
#include <ctype.h>
int main(void)
{
char c = 'C';
if (islower(c))
printf("%c is a lowercase character\n",c);
else
printf("%c is not a lowercase character\n",c);
return 0;
}
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
---|---|---|---|---|
islower |
+ |
+ |
+ |
+ |
_ismbclower |
+ |
|||
iswlower |
+ |
+ |
+ |