Angular UI Development with PrimeNG

Basic types

TypeScript exposes the basic types, as well as a couple of extra types. Let's explore the type system with these examples.

• Boolean: The type is a primitive JavaScript boolean:

let success: boolean = true;

• Number: The type is a primitive JavaScript number:

let count: number = 20;

• String: The type is a primitive JavaScript string:

let message: string = "Hello world";

• Array: The type is an array of value. There are two equivalent notations:

let ages: number[] = [31, 20, 65];let ages: Array<number> = [31, 20, 65];

• Tuple: The type represents a heterogeneous array of values. Tuple enables storing multiple fields of different types:

let x: [string, number];x = ["age", 40];    // okx = [40, "age"] ;   // error

• Any: The ...