unknown (TypeScript)

`unknown` is the type-safe counterpart of `any`. It can hold any value, but TypeScript won't let you use it until you narrow it down to a specific type first.

Welcome to LearnCodingFast — free, interactive programming lessons covering Python, JavaScript, Java, C++, C#, SQL, HTML/CSS, React, AI and more. Every course is hands-on with examples you can run in your browser.