Function Parameter and Return Types

Snippet

You can define the expected types for function arguments and specify what type of data the function will return.

snippet.ts
typescript
function calculateTotal(price: number, tax: number): number {
  return price + tax;
}

Breakdown

function calculateTotal(price: number, tax: number)

Specifies that both 'price' and 'tax' must be numbers.

): number {

Indicates that the function is required to return a number.

From your library