--------Installation of typeScript-----------
 npm init -y
 npm install -g typescript
 
-----about_Execution_Policies------------
-[Open] powerShell
- [type] Set-ExecutionPolicy Unrestricted
- [Answer] yes


-------------typeScript------------------
*extension =>.ts eg: hello.ts
compilation: tsc file_name.ts


--------------Angular----------------
-install last version of nodejs
-install CLI of angular : npm i -g @angular/cli
create new angular project:
-go to the folder you want
-type: ng new name_of_project --style=scss --skip-tests=true

compilation of the project : ng serve

creation of component : ng generate component name_of_component