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lower() is a string method for making all of the letters within a string into lowercase letters. It uses the dot syntax . for creating the expression. For example, “HEllO” can be transformed into lowercase by running "HELLO".lower(), which will return the string 'hello'.


Geeks for Geeks
Read about lower() and related methods like upper(), isupper() and islower() on Geeks for Geeks.


See how to use .lower() on w3schools.

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