We’ll create a simple app with Angular 4 which will sum two numbers input into a form.
First install Angular CLI (https://cli.angular.io/)
$ npm install -g @angular/cli
Create a new project called mathapp,
$ ng new mathapp
Move into this newly created directory,
$ cd mathapp
Now create a component called sum
$ ng g c sum
where g is short for generate and c is for component.
Next be sure to be in the same directory that has package.json and install all packages in there with npm. yarn is also a good package manager, consider faster than npm because it will not install package dependecies already installed in previous packages.
$ npm install
Now let us run the server with,
$ ng serve
Navigate to http://localhost:4200
and you should see the text,
So now we are well on our way! Well done!