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025_islower.asciidoc

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islower

#include <ctype.h>

int islower (char c);
DESCRIPTION

The islower function tests c to determine if it is a lowercase alphabetic character ('a'-'z').

RETURN VALUE

The islower function returns a value of 1 if c is a lowercase letter and a value of 0 if it is not.

SEE ALSO

isalnum, isalpha, iscntrl, isdigit, isgraph, isprint, ispunct, isspace, isupper, isxdigit

EXAMPLE
link:src/islower.c[role=include]
OUTPUT
$ gcc -Wall islower.c
$ ./a.out
islower (_) NO
islower (`) NO
islower (a) YES
islower (b) YES