upper() method converts all lowercase characters in a string into uppercase characters and returns it
upper()method doesn’t take any parameters.
returns a uppercased string of the given string
CODE 1: String with only alphabetic characters
Original String: geeKs For geEkS Converted String: GEEKS FOR GEEKS
CODE 2: String with alphanumeric characters
Original String: g3Ek5 f0r gE3K5 Converted String: G3EK5 F0R GE3K5
Application: One of the common application of upper() method is to check if the two strings are same or not
Strings are same
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