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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