What this snippet does
var declarations are hoisted to the top of their function scope and initialized as undefined.
Expected output
undefined 5
Why practise typing this
Typing variables 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.
More JavaScript practice
- let vs constVariables · beginner
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