explicit conversion in JavaScript

What this snippet does

Always convert types explicitly when combining user input (strings) with numbers to avoid concatenation instead of addition.

Expected output

428
50
50

Why practise typing this

Typing types 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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