在 Python 中，如何在循环中获取总和和平均值

作者: 尚倾城
来源: 51数据库
2022-10-21

问题描述

我已经设法实现了一个循环，但是当我尝试 sum 函数时不断收到语法错误.我需要汇总用户输入的数字并给出平均值.这必须输出给用户.您能否指导我从这里去哪里，谢谢.

这是我到目前为止所做的:

I've managed to implement a loop but keep getting a syntax error when I try the sum function. I need the numbers input by the user to be totalled and the average given as well. This has to be outputted to the user. Could you please guide me on where to go from here, thank you.

This is what I've done so far:

while 1:
    NumCalc = input ("Enter Number :")
    if NumCalc == "done": break

推荐答案

如果您想在循环结束后计算总和和平均值，您可以这样做:

This is what you can do if you want to compute the sum and the mean after the loop ends:

nums = []
while 1:
    NumCalc = input ("Enter Number:")
    if NumCalc == "done": break
    nums.append(float(NumCalc))

print('Sum:', sum(nums), 'and average:', sum(nums)/len(nums))

<小时>在循环中:

s = 0.0
counter = 0

while 1:
    NumCalc = input("Enter Number: ")
    if NumCalc == "done":
        break

    NumCalc = float(NumCalc)
    s += NumCalc
    counter += 1


    print('Sum is', s, 'and the mean is', s/counter)

输出:

Enter Number: 5
Sum is 5.0 and the mean is 5.0
Enter Number: 2
Sum is 7.0 and the mean is 3.5
Enter Number: 4
Sum is 11.0 and the mean is 3.66666666667
Enter Number: 6
Sum is 17.0 and the mean is 4.25
Enter Number: 2
Sum is 19.0 and the mean is 3.8

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