In scalar context, grep returns the number of times the expression was true. Counting things is an extremely common usage of grep. And in "boolean context" you still have the issue of when grep's code block is used for side effects.
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
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horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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