如何使用输入参数命名函数中的参数？

def add(x, y):
    return x + y

result = add(3, 5)
print(result)  # 输出 8

def add(x, y):
    return x + y

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

def add(x, y=0):
    return x + y

result = add(3)
print(result)  # 输出 3

def add(*args):
    result = 0
    for num in args:
        result += num
    return result

result = add(1, 2, 3, 4, 5)
print(result)  # 输出 15

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

print_info(name="Alice", age=25, city="New York")
# 输出：
# name: Alice
# age: 25
# city: New York