#include <ctype.h>
Include dependency graph for islower.c:
Functions | |
| int | islower (int c) |
| Checks if the given character is classified as a lowercase character. More... | |
Function Documentation
◆ islower()
| int islower | ( | int | ch | ) |
Checks if the given character is classified as a lowercase character.
Checks if the given character is classified as a lowercase character using the default local. islower returns true only for the lowercase letters (abcdefghijklmnopqrstuvwxyz). If islower returns true, it is guaranteed that
- See also
- iscntrl,
- isdigit,
- ispunct,
- isspace will return false for the same character in the same default locale.
The behavior is undefined if the value of ch is not representable as unsigned char and is not equal to EOF.
- Parameters
-
ch The character to classify
- Returns
- Non-zero value if the character is a lowercase letter, zero otherwise.
Referenced by bad_input(), good_input(), and toupper().
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