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GBDK 2020 Docs
API Documentation for GBDK 2020
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#include <types.h>Go to the source code of this file.
Functions | |
| BOOLEAN | isalpha (char c) |
| BOOLEAN | isupper (char c) |
| BOOLEAN | islower (char c) |
| BOOLEAN | isdigit (char c) |
| BOOLEAN | isspace (char c) |
| char | toupper (char c) |
| char | tolower (char c) |
Character type functions.
| BOOLEAN isalpha | ( | char | c | ) |
Returns TRUE if the character c is a letter (a-z, A-Z), otherwise FALSE
| c | Character to test |
| BOOLEAN isupper | ( | char | c | ) |
Returns TRUE if the character c is an uppercase letter (A-Z), otherwise FALSE
| c | Character to test |
| BOOLEAN islower | ( | char | c | ) |
Returns TRUE if the character c is a lowercase letter (a-z), otherwise FALSE
| c | Character to test |
| BOOLEAN isdigit | ( | char | c | ) |
Returns TRUE if the character c is a digit (0-9), otherwise FALSE
| c | Character to test |
| BOOLEAN isspace | ( | char | c | ) |
Returns TRUE if the character c is a space (' '), tab (\t), or newline (\n) character, otherwise FALSE
| c | Character to test |
| char toupper | ( | char | c | ) |
Returns uppercase version of character c if it is a letter (a-z), otherwise it returns the input value unchanged.
| c | Character to test |
| char tolower | ( | char | c | ) |
Returns lowercase version of character c if it is a letter (A-Z), otherwise it returns the input value unchanged.
| c | Character to test |