Install Node from nodejs.org website
https://nodejs.org/en/download/
Install angular-cli
npm install -g angular-cli
Create application
ng new ng7forms
cd ng7forms
ng serve
To add bootstrap
npm install bootstrap --save
Add below line in angular.json file
"styles": [
"./node_modules/bootstrap/dist/css/bootstrap.min.css",
"src/styles.css"
],
Run and open the browser
ng serve -o