What is exception propagation in Scala

Question

Can anyone explain the term execution propagation in Scala?

Answer 1

Hi,

• When a function experiences an exception, it looks for a handler to deal with it. 
• When it fails to find one, it searches for one in the caller method. Failing there, it looks for yet another in the next caller in the chain. 
• Whenever it does find a handler, it makes it catch the exception. This is exception propagation.