How do we use scanf in sololearn?

Question

https://code.sololearn.com/cT426i54QyYr/?ref=app
https://code.sololearn.com/c8PU3uvdI00N/?ref=app

Answer 1

In your code
https://code.sololearn.com/c8PU3uvdI00N/?ref=app

On line 6, replace %i with %d.
On line 11, remove getch();

Then input any number it should work fine

Answer 2

I want to scanf value in c program on sololearn app,but how do ?