flutter Android SDK version code example

Example 1: how to check flutter version

flutter --version

Example 2: flutter sdk

$ export PATH="$PATH:`pwd`/flutter/bin"

Example 3: Downloading Dart SDK from Flutter engine on checking flutter version

This error comes if you stopped the "flutter upgrade" command and the 
installation is not completed. 
Solution: if you have the last version zip then replacing it with current or 
adding that to new folder and then update the env PATH will solve this issue.
Or download zip file from here https://flutter.dev/docs/get-started/install/windows
and follow the same process as above

Example 4: flutter change to beta channel to dev

$ flutter upgrade

Flutter 0.5.1 • channel beta • https://github.com/flutter/flutter.git
Framework • revision c7ea3ca377 (9 weeks ago) • 2018-05-29 21:07:33 +0200
Engine • revision 1ed25ca7b7
Tools • Dart 2.0.0-dev.58.0.flutter-f981f09760