將數字輸入傳遞給函數。 Javascript

Question

我正在嘗試將數字輸入傳遞給函數並得到答案。 這是我到目前為止所擁有的。

 var x = firstProblem(); function firstProblem(firstNumber, secondNumber) { return firstNumber * secondNumber; } document.getElementById("first").innerHTML = x;

 #firstNumber { height: 3em; font-size: 2em; } #secondNumber { height: 3em; font-size: 2em; }

 <p>If I save <input type="number" id="firstNumber" value="0"> a week how many weeks would It take to get to <input type="number" id="secondNumber" value="0"></p> <p id="first"></p>

Answer 1

const first = document.getElementById('first');
const firstNumber = document.getElementById('firstNumber');
const secondNumber = document.getElementById('secondNumber');

firstNumber.addEventListener('change', onChange);
secondNumber.addEventListener('change', onChange);

function onChange() {
  first.innerHTML = firstProblem(firstNumber.value, secondNumber.value);
}

function firstProblem(firstNumber, secondNumber) {
  return firstNumber * secondNumber;
}