isupper() String Method in Python with Examples

isupper() method returns True if the string is a uppercase string otherwise it returns False.

A string is uppercase if all cased characters in the string are uppercase and there is at least one cased character in the string.

Example 1: isupper() String Method

message = 'WELCOME TO PYTHON'

if message.isupper():
    print('"%s" is uppercase string.' %(message))
else:
    print('"%s" is not uppercase string.' %(message))

Output

"WELCOME TO PYTHON" is uppercase string.

Example 2: isupper() String Method

message = 'Welcome to Python'

if message.isupper():
    print('"%s" is uppercase string.' %(message))
else:
    print('"%s" is not uppercase string.' %(message))

Output

"Welcome to Python" is not uppercase string.

Related String Methods