Why do i need to throw exception here

Question

In the code when i remove throws Exception it won't compile.
Plis tell me the specific reason.
I mean which line requires the exception to be thrown.
Thank you
https://code.sololearn.com/c7xj5SK1w4CW/?ref=app

Answer 1

BufferedReader.readLine() throws an IOException
You need to wrap these calls in a try catch to handle them or throw the exception up the call stack.

https://docs.oracle.com/javase/8/docs/api/java/io/BufferedReader.html