What is the difference between die and exit in perl?

die: outputs stderr then exit and also it can trap errors by evalexit: just exits or exit with EXPR

die("couldnot open filen"); ---> terminate the program with customized message.
die -> terminates with last system error message.
exit(0) or exit; for success 
exit(1); failure
die function never accepts number as argument.It always accepts string or nothing.
die function always terminate prgram with error message wheras exit just terminates

1) die is used to throw an exception (catchable using eval).
exit is used to exit the process.

2) die will set the error code based on $! or $? if the exception is uncaught.
exit will set the error code based on its argument.

3) die outputs a message
exit does not.

There is not same it must be difference . I am sure it must difference but same action perform.but returning a value difference may be like string variable what ever may be

die function was print a error message and exit function does not ... Otherwise both are same functionality