Python basic syntax-functions

Function

(a) Concept: A code snippet that implements a single function or related function, maximizing the reuse code of a function class

(b) Function definition:

def 函数名 (参数列表)    函数体    return [表达式]    #返回的“表达式”是选择性的；如果没有value返回，那么返回值是None

Example (1): Parameter has a return

def Sum(x, y):    sum = x + y    return sum#函数调用sum = Sum(1, 2)print(sum)输出结果：3

Example (2): There are multiple returns

def x_y_comp_tuple(x, y):    res1 = x + y    res2 = x * y    return res1, res2a, b = x_y_comp_tuple(2, 3)print("a = {}, b = {}".format(a, b))输出结果：a = 5, b = 6

Example (3): List as return value

 稍后填充

Python basic syntax-functions