Flip Letter Case
When processing text, you may need to quickly swap character case: uppercase letters become lowercase, and lowercase letters become uppercase. Write a function swap_case that goes through the string s and changes the case of each letter. All other characters, such as spaces, digits, and punctuation, must stay unchanged.
Примеры
Ввод
"Hello"Вывод
"hELLO"Ввод
"WORLD"Вывод
"world"Ввод
"abc"Вывод
"ABC"Нужно реализовать
def swap_case(s: str) -> str:
Теги
strings
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1
Input
"Hello"Expected
"hELLO"2
Input
"WORLD"Expected
"world"3
Input
"abc"Expected
"ABC"4
Input
"123!"Expected
"123!"5
Input
"MixedCase123"Expected
"mIXEDcASE123"6
Input
""Expected
""Focus radio
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