Answers for "how to install angular using npm"

install angular cli

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

how to install angular using npm

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      npm install -g @angular/cli

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