Ambient declarations are a way of telling the TypeScript compiler that the actual source code exists elsewhere. When you are consuming a bunch of third…

To organize code, TypeScript use module. Internal Module Internal modules came in earlier version of Typescript. This was used to logically group classes, interfaces, functions…

A namespace is a way to logically group related code. This is inbuilt into TypeScript unlike in JavaScript where variables declarations go into a global…

An object is an instance which contains set of key value pairs. The values can be scalar values or functions or even array of other…

Declare classes Syntax A class Declaration can include the following: Properties − A Property is any variable declared in a class. Properties represent data pertaining…

An interface is a syntactical contract that an entity should conform to. In other words, an interface defines the syntax that any entity must adhere…

Syntax: Example 1: Union Type variable: Result: Example 2: Union Type and function parameter Result: Example 3: Union Type and Array Result:

Like Array, but Tuple can store a collection of values of varied types: Syntax Example: Accessing values in Tuples Syntax Example: Result: Destructuring a Tuple…

Features of an Array An array declaration allocates sequential memory blocks. Arrays are static. This means that an array once initialized cannot be resized. Each…

Example about String: The String object Syntax String Properties constructor : Returns a reference to the String function that created the object. Example: Result: length…