angular cli version for angular 9 code example
Example 1: how to check for angular cli version
ng --version
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
Example 3: install angular cli version
Install Specific Version (Example: 6.1.1)
npm install -g @angular/cli@6.1.1