chnage node version code example

Example 1: node install specific version

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

Example 2: how to change node version

nvm use --delete-prefix $NODE_VERSION

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

Example 3: node specific version install

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