Painful menstrual periods are periods in which a woman has crampy lower abdominal pain, sharp or aching pain that comes and goes, or possibly back pain. Some pain during your period is normal, but a large amount of pain is not. The medical term for painful menstrual periods is dysmenorrhea.
When an exception occurs, we say that the exception is thrown. For example, we say that Integer.parseInt(str) throws an exception of type NumberFormatException when the value of str is illegal. When an exception is thrown, it is possible to catch the exception and prevent it from crashing the program. This is done with a try..catch statement.
The exception identifier. When an exception is thrown in the try block, exception_var (e.g. the e in catch (e)) holds the value specified by the throw statement. You can use this identifier to get information about the exception that was thrown. This identifier is local to the catch clause.