Difference between ionic run vs ionic build



Could you please let me know what’s the difference between these two commands?
( this for ionic 1 )

ionic cordova build ios
ionic cordova run ios

I make changes to the www folder, and wish to see the changes on the device, what’s the fastest way?


build builds an app file for you to copy to devices (manually).
run does the same but also runs the app file on the connected device.
emulate does the same as run but on a local emulator/simulator.