isupper()

Purpose:

isupper() indicates if <str> is all uppercase letters or not.

Usage:

ret = isupper(<str>);

Arguments:

alpha <str> - The alpha var to check.

Returns:

integer <ret>

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

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

Where Used:

isupper() can be called from anywhere.

Example:

Description:

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

Bugs/Features/Comments:

See Also: isdigit() islower() toupper()