Python String isupper()

The syntax of isupper() method is:

string.isupper()

String isupper() Parameters

The isupper() method doesn't take any parameters.

Return value from String isupper() 

The isupper() method returns:

• True if all characters in a string are uppercase characters
• False if any characters in a string are lowercase characters

Example 1: Return value of isupper()

Output

True
True
False

Example 2: How to use isupper() in a program?

Output

Does not contain lowercase letter.
Contains lowercase letter.