Problem with returning value from asynchronous function using callback

Question

Here in my code, I want the processInput() to return the final result, but I am actually dealing with asynchronous function that returns a promise, so I am feeling harder to do it.
Anyone can help me plz.
My requirement is the function "processInput()" should return the result.
https://code.sololearn.com/WAZ9kYhNzsaH/?ref=app

Answer 1

March Zucherberg
I got the problem
The console log runs before it gets the data.
If your log the value in the call back function then it works

Answer 2

And also if you are using promise then no need to use async await.

Answer 3

Refactored according to your requirement.
https://code.sololearn.com/Wa0A0a5a76A2