Returns the string with all uppercase letters converted to lowercase.
upper()
Returns the string with all lowercase letters converted to uppercase.
title()
Returns the string with the first letter ofevery word in the string in uppercase and the rest in lowercase.
capitalize()
Returns the string with the first letter of the word in the string in uppercase and the rest in lowercase.
find()
This method is used to locate the position of the given substring within the string; find returns -1 if it is unsuccessful in finding the substring.
index()
Same as find() but raises an exception if the substring is not present in the given string.
isalpha()
Returns True if the string contains only letters, otherwise returns False.
isdigit()
Returns True if the string contains only digits and False otherwise.
isalnum()
Returns True if the string contains only letters and digits, i.e., all characters are alphanumeric and Flase otherwise if the string contains any special character like _, @, #, * including space.
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