how to change node version code example

Example 1: upgrade node version

nvm install v12.16.2

Example 2: change node version

Usage:
nvm install <version>       Download and install a <version>
nvm use <version>           Modify PATH to use <version>
nvm ls                      List versions (installed versions are blue)

Example 3: node install specific version

nvm install v10.15 //v10.15 is a version i want.

Example 4: use a specific version of node

nvm use {Node version}

Example 5: how to change node version

nvm use --delete-prefix $NODE_VERSION

example:
nvm use --delete-prefix v8.9.4