Build Simple Calculator – Chethan S Poojary

HTML

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>Simple Calculator</title>
    <link href="./styles.css" rel="stylesheet" />
  </head>
  <body>
    <div class="container">
      <h2>Simple Calculator</h2>
      <hr />
      <input type="number" id="number1" placeholder="Enter Number 1" />
      <input type="number" id="number2" placeholder="Enter Number 2" />
      <hr />
      <button onclick="add()">Add</button>
      <button onclick="subtract()">Subtract</button>
      <button onclick="multiply()">Multiply</button>
      <button onclick="divide()">Divide</button>
      <hr />
      <h3>Result: <span id="result"></span></h3>
    </div>

    <!-- script -->
    <script src="./script.js"></script>
  </body>
</html>

JavaScript

function add() {
  let number1 = parseFloat(document.getElementById("number1").value);
  let number2 = parseFloat(document.getElementById("number2").value);
  let result = document.getElementById("result");

  result.textContent = number1 + number2;
}

function subtract() {
  let number1 = parseFloat(document.getElementById("number1").value);
  let number2 = parseFloat(document.getElementById("number2").value);
  let result = document.getElementById("result");

  result.textContent = number1 - number2;
}

function multiply() {
  let number1 = parseFloat(document.getElementById("number1").value);
  let number2 = parseFloat(document.getElementById("number2").value);
  let result = document.getElementById("result");

  result.textContent = number1 * number2;
}

function divide() {
  let number1 = parseFloat(document.getElementById("number1").value);
  let number2 = parseFloat(document.getElementById("number2").value);
  let result = document.getElementById("result");
  
  let divededResult = number1 / number2;
  result.textContent = divededResult.toFixed(2);
}

Styles

* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}

body {
  display: grid;
  place-content: center;
  width: 100%;
  height: 100vh;
}

.container {
  max-width: 400px;
  width: 100%;
  padding: 10px;
  margin: auto;
  border: 1px solid rgba(255, 68, 0, 0.286);
}

button {
  cursor: pointer;
  padding: 10px 15px;
  border: none;
  outline: none;
  margin: 5px;
}

h2,
h3 {
  margin-bottom: 20px;
}

h2 {
  text-align: center;
}

hr {
  margin-block: 20px;
  border: 1px solid orangered;
}

input {
  width: 100%;
  display: block;
  margin-bottom: 10px;
  padding: 10px;
}

/* Chrome, Safari, Edge, Opera */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* Firefox */
input[type="number"] {
  -moz-appearance: textfield;
}