#Hello++ The easiest language to implement AND learn!
<h1>Hello++ Interpreter</h1>
<hr>
<h2>Code</h2>
<textarea id=c></textarea>
<br>
<button onclick='o.value="",c.value.replace(/[^h]/ig,"").split("").map(function($){$&&(o.value="Hellovalue+="Hello World\n")})'>Say hello to the output!</button>
<h2>Output</h2>
<textarea id=o readonly></textarea>
<style>*{font-family:monospace}textarea{width:100%}</style>