编写一个Python程序来查找系列的总和： - X - X ** 2/2！ + X ** 3/3！ - X ** 4/4！ + X ** 5/5！ - X ** 6/6！ [英] Write a Python program to find the sum of the series:- X - X**2/2! + X**3/3! - X**4/4! + X**5/5! - X**6/6!

问题描述

编写一个Python程序来查找系列的总和： - X - X ** 2/2！ + X ** 3/3！ - X ** 4/4！ + X ** 5/5！ - X ** 6/6！



我尝试过：

Write A Python Program To Find The Sum Of The Series:- X - X**2/2! + X**3/3! - X**4/4! + X**5/5! - X**6/6!

What I have tried:

X = int(raw_input("Enter the value for x:"))
j = int(raw_input("Enter The value for j:"))
Sum = 0
Fact = 1
Sign = 1
for i in range(1,x+1):
     for i in range(1,j+1):
               Fact = Fact*1
Sum += (Sign*(X**i)/Fact*j

推荐答案

您在第1行声明 X （大写），但你稍后会参考 x （小写），这是不存在的。

行

You declare X (upper case) in line 1, but you later refer to x (lower case), which does not exist.
The line

Fact = Fact*1

没有做任何有用的事情。

我还怀疑你的代码的最后一行应该与前一行缩进相同。

does not do anything useful.
I also suspect the last line of your code should be indented the same as the previous line.

for i in range(1,x+1):
     for i in range(1,j+1):

使用我因为循环的2个嵌套的计数器也是一个错误。



Using i as the counter of 2 nested for loops is an error too.

Sum += (Sign*(X**i)/Fact*j

这里你给了2 （ bit只有1 ）



建议：拿一张纸写下你所有的东西每个元素的总和为1行，每个元素为1列。

然后你的程序需要准备每个部分，然后更新总和。

Don不介意在代码中使用注释。

Here you gave 2 ( bit only 1 )

Advice: take a sheet of paper and write all what you need with 1 line per element in the sum and 1 column for each piece of element.
Then your program will need to prepare each pieces and then update the sum.
Don't mind using comments in code.

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