What is the difference between ionic1, ionic2 and ionic3? Is ionic2 and ionic3 are same?

I have created project with ionic cli 2.2.1. But when i enter into project directory and type "ionic info" it gives the following result.

Your system information:

Cordova CLI: 6.0.0 Ionic Framework Version: 3.2.1 Ionic CLI Version: 2.2.3 Ionic App Lib Version: 2.2.1 Ionic App Scripts Version: 1.3.7 ios-deploy version: Not installed ios-sim version: Not installed OS: Linux 4.4 Node Version: v6.10.3 Xcode version: Not installed

my project structure is

config.xml ionic.config.json package.json resources tsconfig.json www hooks node_modules plugins src tslint.json

Is this ionic2 project or ionic3 project.

via Amalan Jenicious