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This kind of text transformation is common when you need to scan a string and change each letter. Write a function to_alternating_case that takes a string string and inverts the case of every letter: lowercase becomes uppercase, and uppercase becomes lowercase. Spaces, digits, and other characters should stay unchanged.
"hello world""HELLO WORLD""HELLO WORLD""hello world""HeLLo WoRLD""hEllO wOrld"def to_alternating_case(string: str) -> str:
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Log indThey run when you press "Submit" — your whole solution is checked against them so you can't hard-code answers for the visible cases.