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Python - String upper() Method

The upper() string method is used to convert only the all the lowercase characters in a string to upper case letters.

Note : None of the string methods change the original string and only return a new string which reflects the change performed by the string method, hence the returned string must be stored or used(if needed to reflect the result), otherwise it is lost.

Signature of upper()

The upper() method has no parameters, so we don't have to worry about passing it some value.

# Signature of upper() method 

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