change node version using npm code example

Example 1: 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 2: node install specific version

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

Example 3: change node version

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash

Example 4: node specific version install

curl -o- https://raw.githubusercontent.com/creationix/nvm/v0.34.0/install.sh | bash