Python String islower() Method

Last Updated : 30 Dec 2025

Python string islower() method returns True if all characters in the string are in lowercase. It returns False if not in lowercase.

Syntax of Python String islower() Method

It has the following syntax:

Parameters

No parameter is required.

Return

It returns either True or False.

Different Examples of Python String islower() Method

Let's see some examples of islower() method to understand it's functionalities.

Example 1

A simple example to understand how to apply this method. It returns true, see the example below.

Output:

Example 2

It returns False if any single char found in other case than lowercase. See the example below.

Output:

Example 3

String can have digits also and this method works in letters case and ignores digits. So it returns True, see the example below.

Output: