如何将变量传递给函数？

def add(a, b):
    result = a + b
    return result

x = 5
y = 3
sum = add(x, y)
print(sum)  # 输出 8

def greet(name, message):
    print(f"Hello, {name}! {message}")

name = "Alice"
message = "How are you?"
greet(message=message, name=name)  # 输出 "Hello, Alice! How are you?"

def power(base, exponent=2):
    result = base ** exponent
    return result

x = 3
square = power(x)  # 使用默认的指数值2
cube = power(x, 3)  # 指定指数值为3
print(square)  # 输出 9
print(cube)  # 输出 27

def print_items(*args):
    for item in args:
        print(item)

print_items("apple", "banana", "orange")  # 输出 "apple", "banana", "orange"

def print_dict(**kwargs):
    for key, value in kwargs.items():
        print(f"{key}: {value}")

print_dict(name="Alice", age=25)  # 输出 "name: Alice", "age: 25"