Web Reference: Definition and Usage The swapcase() method returns a string where all the upper case letters are lower case and vice versa. Jan 2, 2025 · swapcase() method in Python is used to return a new string where all the uppercase characters in the original string are converted to lowercase, and all the lowercase characters are converted to uppercase. Learn how to use the swapcase() method to convert all characters of a string to their opposite case (uppercase to lowercase and vice versa). See examples, syntax, parameters, and return value of the swapcase() method.
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