how to install angular cli version using terminal code example

Example 1: install angular cli

npm install -g @angular/cli
ng new my-dream-app
cd my-dream-app
ng serve

Example 2: install angular cli

npm install -g @angular/cli    //make sure you have node/npm installed 
ng new <appname>        //  eg:  ng new my-app
cd <appname>       // cd my-app
ng serve