Description
The isupper function returns a value of type boolean, which indicates whether the parameter passed to it is a uppercase alphabetic character. If the parameter is a uppercase alphabetic character then the value true is returned, and if the parameter is not a uppercase alphabetic character then the value false is returned.
Parameter
The isupper function's only parameter is an expression of char type.
Example
isupper('a') returns false
isupper('A') returns true
isupper('1') returns false
isupper('@') returns false
isupper('_') returns false
Portability
Operating Systems: All
Standard Pascal: No