Quiz · 3 questions

🧱 Primitives — The Base Types Everything Else Sits On

string, number, boolean, null, undefined, void, any, unknown, never, symbol, bigint, literal types

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Quiz

01What is the difference between any and unknown?

Hint

Try assigning each to a string variable. One compiles, one doesn't.

02Which scenario is never the correct type for?

Hint

Hover a throw new Error() inside a function. What does the editor say the function returns?

03What's the difference between null and undefined in TypeScript?

Hint

Try const x: string = null with strict mode on. Then try const x: string = undefined. Both fail — and the error message tells you which one you used.

← PreviousLiteral Types: When `'red'` Becomes Its Own Type 🔷 Types & Interfaces — Naming the Shapes →`type` Aliases: Naming the Shapes

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