What does the error message mean ? (In c#)

Question

So, I am new in c# and learned it yesterday. And I now learned how to make calculator in c# and found message below and when I give no input, it gives the error message = "Unhandled Exception ..." Can anybody please explain to me what's happening? And what is the solution for the problem
https://code.sololearn.com/cq9R6JhJPTl9/?ref=app

Answer 1

Your program requires 3 inputs to work, 2 numbers and 1 operator. The error you saw happened because (as you wrote) "when I give no input", so when the program tries to convert string input to number, it failed, because there is nothing to convert.

Answer 2

Ipang , thank you very much. Your explanation really has helped clear my confusion👍. Good day🇮🇩🇯🇵

Answer 3

Very welcome my friend 👌