E. String Methods (islower, isupper, istitle)

String islower() Method

- The islower() method Returns True if all characters in a string are in lowercase otherwise False.



String isupper() Method

- The isupper() method Returns True if all characters in a string are in uppercase otherwise False.



String istitle() Method

- The istitle() method Returns True if a string follows the rules of a title otherwise False.

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