阻止工作时如何？ [英] How does this while block work?

问题描述

var result = 1
var counter = 0
while (counter < 10) {
     result = result * 2
     counter += 1
};

console.log(result);

我很困惑这里的计数器更新结果如何？我们正在增加1，但这会对结果产生什么影响？

I am confused how does counter update result here? We are increasing counter by 1 but how does that affect the result?

有人可以把它愚蠢地告诉我吗？我是编程新手。

Can someone please dumb it down to me? I am new to programming.

编辑：我知道这个问题已被多次询问。我搜索了很多答案，但没有得到我需要的信息。我有一个非常具体的疑问，并希望澄清它，所以请轻松按下该按钮。 ：）

Edit : I know this question has been asked many times. I searched through many answers but didn't get the info I required. I have a very specific doubt and wanted to clarify it so please go easy on that down button. :)

[已解决]

与for循环相同的代码。

Same code with for loop.

var result = 1
for (counter = 0; counter < 10; counter++) {
  result *= 2;
};
console.log(result);

推荐答案

结果和计数器是此代码中具有不同目标的单独变量。

result and counter are separate variables with different goals in this code.

counter 增加，如

 counter += 1

因此最终而条件

while (counter<10)

将被满足并且代码将停止执​​行。

will be satisfied and the code will cease to execute.

至于结果，每次执行while块中的代码时，结果乘以2更新

As for result, each time the code in the while block is executed, result updated by multiplying by 2

result = result*2

由于变量 result 已初始化，因此已更新在之外，而循环但可以通过它访问。使用上面的语句，它将获取现有的结果变量并将其乘以2，然后将其存储回结果。

It is 'updated' because the variable result was initialized outside the while loop but is accessible by it. With the above statement, it is taking the existing result variable and multiplying it by 2 then storing it back in result.

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