var loop binding in JavaScript

What this snippet does

var is function-scoped so all callbacks close over the same variable; let creates a new binding per loop iteration.

Expected output

var: 3
var: 3
var: 3
let: 0
let: 1
let: 2

Why practise typing this

Typing closures code builds muscle memory for the symbols and indentation JavaScript uses most, which prose-based typing tests never cover. DevType measures your words per minute and accuracy on this snippet and tracks the individual characters you mistype, so later lessons can target them.

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