Python has many helper functions in its libraries that always help us with some day to day tasks. Let`s see how the string
islower () method works which actually checks if all characters in the string are lowercase.
Syntax: string .islower ()
Returns: True if all the letters in the string are in lower case and False if even one of them is in upper case.
Code # 1: Demonstration of islower ()
Is pythonengineering full lower?: True Is Geeksforgeeks full lower?: False
Practical use: This function can be used in many ways and has many practical uses. such applications are lowercase validation, proper name validation, sentence validation, which requires all lowercase letters. Below is a small example demonstrating the use of the
islower () method.
Code # 2: Practical Demonstration islower () method
Number of proper nouns in this sentence is: 3