Open lib/main.dart.

Change the string

        'You have pushed the button this many times'

        to

        'You have clicked the button this many times'

        
           Important:
  Do not stop your app. Let your app run.

Save your changes.

Type r in the terminal window.

You’ll see the updated string in the running app almost immediately.

Profile or release runs

Important:
  Do not test the performance of your app with debug and
  hot reload enabled.