how to install specific version in npm code example

Example 1: how to install specific package version npm

$ npm install express@4.16.1

+ express@4.16.1
added 48 packages from 36 contributors and audited 121 packages in 2.986s
found 0 vulnerabilities

Example 2: npm install specific version

$ npm i packageName@1.2.3

Example 3: node install specific version

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