add flutter to path code example

Example 1: flutter setup macos

if your terminal doesn't see "flutter" you have to use  
Open terminal and paste 

export PATH="$PATH:`pwd`/flutter/bin"
and then try "flutter" && "flutter doctor"

Example 2: path flutter

path: ^1.8.0

Example 3: flutter sdk path

where flutter

Example 4: path to flutter linux

/* If path does not appear in android studio do this... */

sudo snap install flutter --classic
sudo snap install flutter-gallery
flutter channel dev
flutter upgrade
flutter config --enable-linux-desktop

/* close the editor and reopen, try and create a new flutter project */
/* and now the path is there...  */
/* /home/(username)/snap/flutter/common/flutter */

Example 5: install flutter

C:\src>git clone https://github.com/flutter/flutter.git -b stable

Example 6: install flutter

$ sudo snap install flutter --classic