TypeScript

Inferring a number type from assignment in TypeScript

TypeScriptVariables and DeclarationsType Inferencebeginner

What this snippet does

TypeScript automatically deduces types from variable initialization, reducing boilerplate.

Expected output

number

Why practise typing this

Typing variables and declarations code builds muscle memory for the symbols and indentation TypeScript 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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