Computer science definition of exception

What is that an exception?
An exception is something that is left out or not done on purpose.
An exception to a rule does not follow that rule.
This word is used for all sorts of things that are not usual or usually allowed..
What is the purpose of the exception?
Exceptions provide the means to separate the details of what to do when something out of the ordinary happens from the main logic of a program..
Why are computer errors called exceptions?
The term "exception" is preferred to "error" because it does not imply that anything is wrong - a condition viewed as an error by one procedure or programmer may not be viewed that way by another..
Why exceptions are important in programming?
Exception handling is the process of responding to unwanted or unexpected events when a computer program runs.
Exception handling deals with these events to avoid the program or system crashing, and without this process, exceptions would disrupt the normal operation of a program..
Why is it called exception?
The term exception is shorthand for the phrase "exceptional event." Definition: An exception is an event that occurs during the execution of a program that disrupts the normal flow of instructions during the execution of a program..

What is that an exception?