如何在每个循环中保存变量的值，以便以后可以使用这些值

Question

我是一个完全的初学者，所以请原谅我缺乏知识。

我有一个多次执行的代码，一个变量的值是由用户通过提示给出的。有没有办法在每个循环中存储这个值，并在循环结束时显示它。有没有我应该使用的某个元素？

谢谢。

var ran = Math.floor(Math.random() * 60) + 1;
var ngs = 9;
var guess = prompt("what's your guess?");

while (ngs > 0) {
  if (guess < ran) {
    var guess = prompt("nope, that was too low. you have " + ngs + " attempts left. guess again");
    ngs = ngs - 1;
  } else if (guess > ran) {
    var guess = prompt("nope, that was too high. you have " + ngs + " attempts left. guess again.");
    ngs = ngs - 1;
  } else if (guess == ran) {
    alert("gj. you win. your guesses were: ");
  }
}
alert("no more attempts. you lose. your guesses were: ");

我需要在最后的警报，以显示用户作出了什么猜测。

Answer 1

epascarello在上面的评论中是正确的。我个人建议将其写入字符串，但推送到数组也同样有效。

String方法

var ran = Math.floor(Math.random() * 60) + 1;
var ngs = 9;
var guess = prompt("what's your guess?");
var guesses = ""

while (ngs > 0) {
  if (guess < ran) {
    var guess = prompt("nope, that was too low. you have " + ngs + " attempts left. guess again");
    ngs = ngs - 1;
    guesses += guess + ' ';
  } else if (guess > ran) {
    var guess = prompt("nope, that was too high. you have " + ngs + " attempts left. guess again.");
    ngs = ngs - 1;
    guesses += guess + ' ';
  } else if (guess == ran) {
    alert("gj. you win. your guesses were: " + guesses);
  }
}
alert("no more attempts. you lose. your guesses were: " + guesses);

数组方法

var ran = Math.floor(Math.random() * 60) + 1;
var ngs = 9;
var guess = prompt("what's your guess?");
var guesses = []

while (ngs > 0) {
  if (guess < ran) {
    var guess = prompt("nope, that was too low. you have " + ngs + " attempts left. guess again");
    ngs = ngs - 1;
    guesses.push(guess);
  } else if (guess > ran) {
    var guess = prompt("nope, that was too high. you have " + ngs + " attempts left. guess again.");
    ngs = ngs - 1;
    guesses.push(guess);
  } else if (guess == ran) {
    alert("gj. you win. your guesses were: " + guesses.join(' '));
  }
}
alert("no more attempts. you lose. your guesses were: " + guesses.join(' '));

Answer 2

跳过if/else中的猜测变量的重新声明。其次，您可以查看下面的链接，了解有关Array类的描述。Javascript Array