What is TypeScript type inference?

What is TypeScript type inference?

TypeScript type inference is the ability of the TypeScript compiler to automatically deduce the type of a variable based on its value.

Can you give me an example of type inference in TypeScript?

Sure! If you declare a variable like let num = 5;, TypeScript infers that num is of type number.

What happens if I try to assign a different type to it?

If you try to assign a different type, like num = 'hello';, TypeScript will throw an error because it expects a number.

Are there cases where I need to explicitly define types?

Yes, in complex scenarios or when using generics, it's often better to explicitly define types for clarity.