doc/doxygen/ctype_8h_source.html

 #pragma once


 int isdigit(int c);


 int isalpha(int c);


 int iscntrl(int c);


 int isalnum(int c);


 int isxdigit(int c);


 int islower(int c);


 int isupper(int c);


 int tolower(int c);


 int toupper(int c);


 int isspace(int c);

iscntrl
int iscntrl(int c)
Check if the given value is a control character.
Definition: ctype.c:21

isalpha
int isalpha(int c)
Check if the given value is a letter.
Definition: ctype.c:16

isdigit
int isdigit(int c)
Check if the given value is a digit.
Definition: ctype.c:11

isspace
int isspace(int c)
Check if the given value is a whitespace.
Definition: ctype.c:64

islower
int islower(int c)
Check if the given value is a lower case letter.
Definition: ctype.c:36

toupper
int toupper(int c)
Transforms the given value into an upper case letter.
Definition: ctype.c:55

tolower
int tolower(int c)
Transforms the given value into a lower case letter.
Definition: ctype.c:46

isupper
int isupper(int c)
Check if the given value is an upper case letter.
Definition: ctype.c:41

isxdigit
int isxdigit(int c)
Check if the given value is an hexadecimal digit.
Definition: ctype.c:31

isalnum
int isalnum(int c)
Check if the given value is either a letter or a digit.
Definition: ctype.c:26