如果我想强迫用户在javascript提示中仅插入数字，则>> [

Question

我正在做一个猜谜游戏。我刚刚开始使用javascript。我如何强制用户在提示框中输入数字？

var secretNumber = 4
var guess = Number(prompt("Guess a Number"));
if (guess === secretNumber) {
    alert("you got it right brah!!!!!!");
}
if (NaN(guess)) {
    alert("must input numbers")
    return false;
}
else if (guess < secretNumber) {
    alert("your number is too low !");
}
else {
    alert("your number is too high !");
}





if (NaN(guess)) {
    alert("must input numbers")
    return false;

我希望用户填写字母或任何非数字的内容时会收到警报，告知他必须使用数字。

我正在做一个猜谜游戏。我刚刚开始使用javascript。我如何强制用户在提示框中输入数字？ var secretNumber = 4 varguess = Number（提示（“猜一个数字”）...

Answer 1

var secretNumber = 4;
var guess;
while(isNaN(guess=prompt("Guess a Number")))alert("must input numbers");
if (guess === secretNumber)
  alert("you got it right brah!!!!!!");
else if(guess < secretNumber)
  alert("your number is too low !");
else 
  alert("your number is too high !")