carp - warn of errors (from perspective of caller)

croak - die of errors (from perspective of caller)

confess - die of errors with stack backtrace


    use Carp;
    croak "We're outta here!";


The Carp routines are useful in your own modules because they act like die or warn, but report where the error was in the code they were called from. Thus if you have a routine Foo that has a carp in it, then the carp will report the error as occurring where Foo was called, not where carp was called.