Isupper
Isupper is a name given to a function or method used in several programming languages to test whether the alphabetic characters in a string are all uppercase. The check typically ignores digits, punctuation, and other non-cased characters, and it requires at least one cased character to be present for a positive result.
Python provides a string method named isupper, invoked as s.isupper(). It is Unicode-aware: it returns True if
In C, isupper is a function declared in ctype.h. It tests whether a given character is an
Other languages provide similar functionality under different names. Java offers Character.isUpperCase for single characters, while many
Common uses include input validation, formatting checks, and user interface constraints. Limitations include differing definitions of