How does “do something OR DIE()” work in Perl?

The die() function can be used to stop the script and can be used to display a message to the end user. It can be used at the right side of the OR ( || ) operator and at left side can be any expression like the eval() function.

Case 1 − Using die() function with no parameter

The following is the output.

Now we can use $! to print the error number and a message to the user in the die() function.

Case 2 − Use of $! in the die() function

The following is the output.

Case 3 − Display some message to the end user with the die() function

The following is the output.