I experienced a lot of pain points when I first started using Angular; I needed to open up so many files just to create a simple Hello World app. Luckily, Angular CLI took away a lot of my initial troubles.
Angular CLI is a command-line tool that creates a simple Angular project. Angular CLI asks you questions about your app and, based on your answers, it determines the routing and the stylesheet format. How does Angular CLI do this? It uses Schematics.