Is runApp() method necessary to create a flutter app?

Question

dart code

I expected this code to paint a black colored rectangle to screen but it didn't .I'm using flutter framework and I want to know that don't flutter support making apps like these or any mistake in my code. I just wanted to make run flutter code without built-in flutter framework library

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Solution

Yes, it's necessary. In dart only execute code inside the main method. Not like JavaScript or Python. It's like java/c. The only execution is the main method.

Comments

[Shubham Narkhede]

yes is necessary runApp() method to create app

[dm_tr]

Your main() method must contain runApp(MyApp()). MyApp must be a Stateful or Stateless widget which must return a MaterialApp Widget

[pskink]

no, runApp is not necessary, check github.com/flutter/flutter/tree/…, it shows 4 different layers, try 2 first: raw and rendering

[Ganesh]

Thanks the link cleared my doubt

[pskink]

sure, your welcome