提示号码验证JS

Question

我目前使用hint（）具有这个超级基本的“计算器”：

var numberOne = parseInt(prompt("Enter a number"))
var numberTwo = parseInt(prompt("Enter another number"))
let additionAnswer = numberOne + numberTwo
console.log("Addition answer = " + additionAnswer);
let substractionAnswer = numberOne - numberTwo
console.log("Substraction answer is " + substractionAnswer);
let multiplicationAnswer = numberOne * numberTwo
console.log("Multiplication answer = " + multiplicationAnswer);
let divisionAnswer = numberOne / numberTwo
console.log("Division answer is " + divisionAnswer);

现在我只是想知道我该怎么做才能验证提示中写的确实是数字。

Answer 1

继续提示直到收到号码？

var numberOne = '';
var numberTwo = '';

while (isNaN(parseFloat(numberOne)) || !isFinite(numberOne)) {
  numberOne = prompt("Enter a number");
}

while (isNaN(parseFloat(numberTwo)) || !isFinite(numberTwo)) {
  numberTwo = prompt("Enter a number");
}

numberOne = parseInt(numberOne);
numberTwo = parseInt(numberTwo);

let additionAnswer = numberOne + numberTwo

console.log("Addition answer = "+ additionAnswer);

let substractionAnswer = numberOne - numberTwo 

console.log("Substraction answer is "+ substractionAnswer);

let multiplicationAnswer = numberOne * numberTwo

console.log("Multiplication answer = "+ multiplicationAnswer);

let divisionAnswer = numberOne / numberTwo

console.log("Division answer is "+ divisionAnswer);

Answer 2

您可以使用('/\d/').test(str1)。