- An exception is a problem that arises during the execution of a program. A C++ exception is a response to an exceptional circumstance that arises while a program is running, such as an attempt to divide by zero.
-Exceptions provide a way to transfer control from one part of a program to another. C++ exception handling is built upon three keywords. Three Keywords in exceptions are
*throw − A program throws an exception when a problem shows up. This is done using a throw keyword.
*catch − A program catches an exception with an exception handler at the place in a program where you want to handle the problem. The catch keyword indicates the catching of an exception.
*try − A try block identifies a block of code for which particular exceptions will be activated. It's followed by one or more catch blocks.