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