Hello everyone May i ask something?

Question

I have been building a simple calculator. It works.but the system still shows that it is not perfect and there might be corner cases? What do corner cases mean?

Answer 1

A corner case means a case that can happen outside of normal usage of your app. you have to handle all the possible inputs the user can enter

Answer 2

Can you list a few beside numbers and letters? Thank you so much

Answer 3

And symbols also

Answer 4

did you handle if the user divides by zero?

Answer 5

Yes i did but there are so many possibilities how can i remember them all?