How to check lowercase letters in Python 3 ?

String islower( ) Method

The islower() method checks whether all the case-based characters (letters) of the string are lowercase.

Syntax

str.islower()

Return Value

This method returns true if all cased characters in the string are lowercase and there is at least one cased character, false otherwise.

Example

#!/usr/bin/python3 str = "THIS is string example....wow!!!" print (str.islower()) str = "this is string example....wow!!!" print (str.islower())

Result

False True

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