3.2.192 warn

warn 

LIST

This function produces a message on STDERR just like die , but doesn't try to exit or throw an exception. For example:

warn "Debug enabled" if $debug;

If the message supplied is null, the message "Something's wrong" is used. As with die , a message not ending with a newline will have file and line number information automatically appended. The warn operator is unrelated to the -w switch.