JavaScript - Getting your feet wet(How the while loop works)

Head First JavaScript Programming

開発環境

• macOS Sierra - Apple (OS)
• Emacs (Text Editor)
• JavaScript (プログラミング言語)
• Safari(Web browser)

Head First JavaScript Programming (Eric T. Freeman (著)、Elisabeth Robson (著)、O'Reilly Media)の Chapter 1.(Getting your feet wet)、How the while loop works の CODE MAGNETS(No. 765) を取り組んでみる。

CODE MAGNETS(No. 765)

コード(Emacs)

HTML5

<div id="output0"></div>
<script src="sample1.js"></script>  

JavaScript

let div0 = document.querySelector('#output0');

let i = 0;
while (i < 2) {
    div0.innerHTML += 'Happy birthday to you.<br>';
    i += 1;
}
let name = 'Joe';
div0.innerHTML += `Happy birthday to ${name}.<br>`;
div0.innerHTML += 'Happy birthday to you.<br>';