16 lines
484 B
Python
16 lines
484 B
Python
# Question: Write a Python program to check if a character is an uppercase or lowercase letter.
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def main(char: str) -> None:
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if char.isupper():
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print(f"{char} is an uppercase letter.")
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elif char.islower():
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print(f"{char} is a lowercase letter.")
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else:
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raise ValueError("Invalid input. Please enter an alphabetic character.")
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if __name__ == '__main__':
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main('A')
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main('a')
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main('B')
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main('b')
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main('1') # also works with a int |