在Python中，如何在循环中获得总和和平均值

Question

我设法实现循环，但在尝试sum函数时不断出现语法错误。我需要用户输入的数字进行总计并给出平均值。这必须输出给用户。你能指导我从哪里开始，谢谢你。

这是我到目前为止所做的：

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

Answer 1

如果您想计算总和以及循环结束后的平均值，您可以执行以下操作：

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 while ：

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

Answer 2

i = 0
sum = 0
while 1:
    i += 1
    NumCalc = input ("Enter Number :")
    if NumCalc == "done": break
    sum = sum + NumCalc
    print "Average is ", sum/i