what is postman code example

Example 1: what is collection in postman

Postman is a Client toolto work with APIs to
send requests get responseOrganize the requestsCollection 
in Postman is a top level folder
to store your requests so we can run any time

Example 2: what is typescript

Basically, TypeScript is like an extension or "superset" of JavaScript.
Since JavaScript is a loosely typed language,
TypeScript enforces the strict use of types. 
Thus, making it a strictly typed language.