python - iterating with python while loops

Question

Write a while loop that sums the values 1 through end, inclusive. end is a variable that we define for you. So, for example, if we define end to be 6, your code should print out the result:

21 which is 1 + 2 + 3 + 4 + 5 + 6.

Is anybody able to guide me through this, without spoiling it for me?

Answer 1

你可以做两件事。“快速”的方式（关于年轻的高斯的故事）认识到

sum(1:N) = N * (N + 1) / 2

但我怀疑这就是所要求的。

您需要for在一个范围内（查看命令）创建一个循环（查看range命令），并在每次迭代中将循环变量的当前值添加到总和（在循环开始之前将其初始化为零） .

那里 - 你现在应该没事了。

用while循环编辑，仍然让你做一些工作：

mySum = 0
i = 1;
while( <<< put some condition here >>> ):
  mySum = mySum + i
  <<<<< do something clever with i >>>>>
print <<<<< what do you think you should print here? >>>>>

请注意，缩进在 Python 中很重要，语句:末尾的while