不使用sum()打印整数列表的和 [英] Print the sum of a list of integers without using sum()

问题描述

我在下面定义了一个函数，该函数可以打印列表中的每个整数，并且效果很好.我想做的是创建第二个函数，该函数将调用或重新利用int_list()函数来显示已生成列表的总和.

I have a function defined below that prints each integer in the list, and it works perfectly. What I would like to do is create a second function that would call on or reutilize the int_list() function to display a sum of the list that's been generated.

我不确定这是否是代码本身固有的功能-我对Python语法还是很陌生.

I am not sure if that has been inherently performed by the code itself - I am rather new to the Python syntax.

integer_list = [5, 10, 15, 20, 25, 30, 35, 40, 45]

def int_list(self):
    for n in integer_list
        index = 0
        index += n
        print index

推荐答案

在您的代码中，您需要在每个循环中设置index=0，因此应在for循环之前对其进行初始化:

In your code, you're setting index=0 in every loop, so it should be initialized before the for loop:

def int_list(grades):   #list is passed to the function
    summ = 0 
    for n in grades:
        summ += n
        print summ

输出:

int_list([5, 10, 15, 20, 25, 30, 35, 40, 45])
5
15
30
50
75
105
140
180
225

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