Errors forcibly exit the program with a non-zero exit code (unless caught - if possible - using eval {}). Warnings don't (and can't be caught with eval {} either).

See also the difference between die and warn.

update: to check for a non-zero exit code, you can do something like this in a bash/sh type shell: 

perl some_program.pl || echo "That was an error"

[download]
update 2 please don't double post. especially not an hour after the first post.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Warnings vs. Errors by Joost
in thread Warnings vs. Errors by cormanaz

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