promise async/await

Promise and async/await are related concepts in JavaScript that are used to handle asynchronous operations.

A Promise is a JavaScript object that represents the eventual completion (or failure) of an asynchronous operation and allows you to handle the result once it's available. Promises have a "then" method that you can use to register a callback function to be executed when the asynchronous operation completes successfully, and a "catch" method to handle any errors that occur.

Async/await is a more recent addition to the language that simplifies working with Promises by allowing you to write asynchronous code that looks more like synchronous code. The "async" keyword is used to declare a function as asynchronous, and the "await" keyword is used to pause the execution of the function until a Promise resolves. This allows you to write code that is easier to read and understand, without sacrificing performance or reliability.