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，用户通过提示给出变量的值。有没有办法在每个循环上存储此值并在循环结束时显示它。我应该使用某种元素吗？

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: ");

我最后需要警报来显示用户猜测的内容。

Answer 1

epascarello在上面的评论中是正确的。我个人会建议把它写成一个字符串，但推送到一个数组也可以。

字符串方法

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

在if / else中跳过guess变量的重新声明。其次，您可以查看以下链接以获取Array类的描述。 Javascript Array

如何在每个循环中保存变量的值，以便稍后可以使用这些值

2 个答案:

字符串方法

数组方法