Never Type
Last updated
What is Never Type?
The never type in TypeScript represents the type of values that will never occur. This means a function that always throws an error or runs forever (infinite loop) implicitly returns never. It is also useful for exhaustive checking in discriminated unions, ensuring that all possible cases are handled. Essentially, you cannot assign any type to a variable of type never (except never itself), making it the bottom type in TypeScript's type system.
Free resources to learn Never Type
- Official docsNever Type
More in stage 5: Combining Types
Never Type: common questions
Can I learn Never Type in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Never Type in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Never Type tutorial for beginners?
It is lesson 37 of 93 in the free TypeScript roadmap, in stage 5, Combining Types. If you are new to TypeScript, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.