How to use functions in Python?

In Python, using functions can be done by following these steps:

1. ”def” means to define or set up something, typically referring to a function or variable in programming.

def my_function():
    # 函数体
    pass

1. Call a function: Use the function name followed by parentheses to call a function.

my_function()  # 调用函数

1. Function parameters can be specified when defining a function or passed when calling a function.

def greet(name):
    print("Hello, " + name + "!")
    
greet("Alice")  # 传递参数

1. come back

def add(a, b):
    return a + b
    
result = add(3, 5)
print(result)  # 输出 8

In this way, you can use functions in Python. You can define and call functions as needed, and manipulate them based on their parameters and return values.