Case Flipper

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.

Примеры

Ввод
"hello world"
Вывод
"HELLO WORLD"
Ввод
"HELLO WORLD"
Вывод
"hello world"
Ввод
"HeLLo WoRLD"
Вывод
"hEllO wOrld"

Нужно реализовать

def to_alternating_case(string: str) -> str:

Теги

strings
PostgreSQLv16

Hawn jidher ir-riżultat tat-tħaddim tal-kodiċi

Tests12
Visible tests
Test moħbi 7
Test moħbi 8
Test moħbi 9
Test moħbi 10
Test moħbi 11
Test moħbi 12

They run when you press "Submit" — your whole solution is checked against them so you can't hard-code answers for the visible cases.

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