Optionally, pre-download development binaries:

    The flutter tool downloads platform-specific development binaries as
needed. For scenarios where pre-downloading these artifacts is preferable
(for example, in hermetic build environments,
or with intermittent network availability), iOS
and Android binaries can be downloaded ahead of time by running:

    
$ flutter precache
    

    For additional download options, see flutter help precache.

You are now ready to run Flutter commands!

Note:
  To update an existing version of Flutter, see
  Upgrading Flutter.

Run flutter doctor

Run the following command to see if there are any dependencies you need to
install to complete the setup (for verbose output, add the -v flag):

flutter doctor