Angular is constantly updating its versions, every 6 months. There are two ways to make the change: using the Node.js version manager or via command line.

a) Via Command Line:
First, check the Angular version you are using with: ng serve. Then, open the terminal in administrator mode and uninstall the current version: npm uninstall -g @angular/cli.

Now, verify that the cache is correct: npm cache verify. If there’s no error, proceed; otherwise, clear the cache with: npm cache clean --force.

Next, install the desired version (in this case, version 16 which installs the most stable version): npm install -g @angular/cli@16. Verify the installation with: ng version.

b) Via NVM:
Select the version of Node.js to use and install the compatible Angular version with: npm install -g @angular/[email protected]. Uninstall de Angular version with:npm uninstall -g @angular/[email protected]. The Angular version will be install only in the Node current version.
Note: The LTS (Long Term Support) version of Node.js is the stable version and is recommended for most production projects as it receives support and security updates.

We can install a different version of angular for each version of node. This will install only on our used node version.

To see the angular version of the node version used, in a cmd WITHOUT ADMINISTRATOR PERMISSIONS, execute ng version. It is important to do this in another cmd to check the versions, since in the administrator permissions console, it will not send the correct data.

And to uninstall we use the command: npm install -g @angular/cli.

Check compatibilities at: https://angular.dev/reference/versions