islower()

Purpose:

islower() indicates if <str> is all lowercase letters or not.

Usage:

ret = islower(<str>);

Arguments:

alpha <str> - The alpha var to check.

Returns:

integer <ret>

0 - <str> is not composed of ONLY lowercase letters.

1 - <str> is composed of ONLY lowercase letters.

Where Used:

islower() can be called from anywhere.

Example:

Description:

islower() returns 1 if <str> is composed of ONLY lowercase letters. If there are any characters other than A-Z, then islower() returns 0. If <str> is NULL, then islower() will return 1 because there are no non-lowercase letters.

Bugs/Features/Comments:

See Also: isdigit() isupper() toupper()