ctype.h File Reference

#include <types.h>
#include <stdbool.h>

Go to the source code of this file.

Functions
bool	isalpha (char c)
bool	isupper (char c)
bool	islower (char c)
bool	isdigit (char c)
bool	isspace (char c)
char	toupper (char c)
char	tolower (char c)

Detailed Description

Character type functions.

Function Documentation

isalpha()

bool isalpha

(

char

c

)

Returns TRUE if the character c is a letter (a-z, A-Z), otherwise FALSE

Parameters

c	Character to test

isupper()

bool isupper

(

char

c

)

Returns TRUE if the character c is an uppercase letter (A-Z), otherwise FALSE

Parameters

c	Character to test

islower()

bool islower

(

char

c

)

Returns TRUE if the character c is a lowercase letter (a-z), otherwise FALSE

Parameters

c	Character to test

isdigit()

bool isdigit

(

char

c

)

Returns TRUE if the character c is a digit (0-9), otherwise FALSE

Parameters

c	Character to test

isspace()

bool isspace

(

char

c

)

Returns TRUE if the character c is a space (' '), tab (\t), or newline (\n) character, otherwise FALSE

Parameters

c	Character to test

toupper()

char toupper

(

char

c

)

Returns uppercase version of character c if it is a letter (a-z), otherwise it returns the input value unchanged.

Parameters

c	Character to test

tolower()

char tolower

(

char

c

)

Returns lowercase version of character c if it is a letter (A-Z), otherwise it returns the input value unchanged.

Parameters

c	Character to test