def greet(name="World"):
"""シンプルな挨拶を返す関数"""
return f"Hello, {name}!"
def calculate_sum(numbers):
"""数値のリストの合計を計算する関数"""
return sum(numbers)
if __name__ == "__main__":
# 基本的な挨拶
print(greet())
print(greet("Python"))
# リストの合計計算
numbers = [1, 2, 3, 4, 5]
total = calculate_sum(numbers)
print(f"合計: {total}")