<title>JavaScript Scope and Variables</title>
<h1>JavaScript Scope and Variables</h1>
<pre>var x = 1;</pre>
<pre class="appear">
// local scope
for (let x = 1; x &lt; 100; x+=1) {...}
var y = 1;
function process(inp) {
    let y = inp * 2;
    return y;
}
process(y);
</pre>
<pre class="appear">
// constants
const x = 1;
x = 2; // 💣 BOOM!
</pre>
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