NAME

ctype.h — character types

SYNOPSIS

#include <ctype.h>

DESCRIPTION

The <ctype.h> header declares the following as functions and may also define them as macros. Function prototypes must be provided for use with an ISO C compiler.

int   isalnum(int);
int   isalpha(int);
int   isascii(int);
int   iscntrl(int);
int   isdigit(int);
int   isgraph(int);
int   islower(int);
int   isprint(int);
int   ispunct(int);
int   isspace(int);
int   isupper(int);
int   isxdigit(int);
int   toascii(int);
int   tolower(int);
int   toupper(int);

The following are defined as macros: int _toupper(int); int _tolower(int);

APPLICATION USAGE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

isalnum(3) , isalpha(3) , isascii(3) , iscntrl(3) , isdigit(3) , isgraph(3) , islower(3) , isprint(3) , ispunct(3) , isspace(3) , isupper(3) , isxdigit(3) , mblen(3) , mbstowcs(3) , mbtowc(3) , setlocale(3) , toascii(3) , tolower(3) , _tolower(3) , toupper(3) , _toupper(3) , wcstombs(3) , wctomb(3) , <locale.h> .