CTYPE - character type facilities.

Usage:

#include <ctype.h>

Description:

<ctype.h> provides prototypes for a number of routines that determine what type of character has been passed to the routine as an argument. Below we list the prototypes of these routines.

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

Copyright © 1996, Thinkage Ltd.