是否可以使用带 Math.pow 的 while 循环显示 2 的 1,2...10（最大）次方行？

Question

这是我的代码，t work. It seems to me that it has to but when I use console (in inspect section in the browser) nothing happens, it doesn没有发现任何错误。

如果你能告诉我错误在哪里，我将不胜感激(-s)

var counter = 0;
var result = Math.pow (2, counter);
    while (result < Math.pow (2, 10)) {
    console.log(result);
    counter = counter + 1;
    }

Answer 1

另一种写法是：

var result = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].map(function (num) {
  return Math.pow(2, num)
})

Answer 2

正如 juvian 在评论中所述，您正在更新 while 循环中的变量 "counter"，但您还需要在每个循环中更新 "result"。这是您的代码的修订版，并附有解释。

// Counter starts at zero
var counter = 0;

/*
    Result needs to be initialized to check the
    initial condition.

    Alternatively, we could have changed the
    condition of the while loop to something like:
    while (counter <= 10) { ... }

    (this would be technically faster because
     you're not re-computing Math.pow(2,10))
*/
var result = 0;

// We perform the code in here until the condition is false
while (result < Math.pow (2, 10)) {
    // First, we raise 2 to the power of counter (0 the first time)
    var result = Math.pow (2, counter);
    // Print the result
    console.log(result);
    // Now increment the counter
    // (this will change what the first line of the loop does)
    counter = counter + 1;
}

Answer 3

递增的计数器从不用于结果计算。试试这个。

var counter = 0;
while (Math.pow (2, counter) < Math.pow (2, 10)) {
  console.log(Math.pow (2, counter));
  counter = counter + 1;
}

是否可以使用带 Math.pow 的 while 循环显示 2 的 1,2...10（最大）次方行？

Is it possible to display the row of 2 in the power of 1,2...10 (the biggest) using while loop with Math.pow?

javascript

while-loop

pow