[String->IsUpper] checks whether a specified character within the string is uppercase. Accepts an optional integer parameter for the position of the character in the string to check, defaulting to the first character if omitted. The method returns True if the character is uppercase or False otherwise.
'String Object'->isupper 'String Object'->isupper(Integer)
Use the [String->IsUpper] method. The following example returns False since the fifth character of the string is not upper case.
'The quick white rhino'->isupper(5)
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