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()

 # example string string = "THIS IS GOOD!" print(string.isupper()); # numbers in place of alphabets string = "THIS IS ALSO G00D!" print(string.isupper()); # lowercase string string = "THIS IS not GOOD!" print(string.isupper());

Output

 True True False 

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

 string = 'THIS IS GOOD' if string.isupper() == True: print('Does not contain lowercase letter.') else: print('Contains lowercase letter.') string = 'THIS IS gOOD' if string.isupper() == True: print('Does not contain lowercase letter.') else: print('Contains lowercase letter.')

Output

 Does not contain lowercase letter. Contains lowercase letter.

Also Read:

• Python String islower()
• Python String upper()