Python String isupper() Method

Last Updated : 30 Dec 2025

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

Syntax of Python String isupper() Method

It has the following syntax:

Parameters

No parameter is required.

Return

It returns either True or False.

Different Examples of Python String isupper() Method

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

Example 1

Let us take an example to demonstrate the Python String isupper() Method.

Output:

Example 2

Let us take another example to demonstrate the Python String isupper() Method.

Output:

Example 3

Let us take another example to demonstrate the Python String isupper() Method.

Output: