Monks, I come seeking wisdom and am confused by a statement I see.... I inherited a perl code project, and this statement in this foreach loop is confusing me... $chapter will end up being something like "5","7", and "11V"....

foreach my $chapter (.....){
   ( $chapter =~ /5/ )  and ( $chapter = 5 );
   ......
   ......
}
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The second part of the "and" seems to be assigning "5" to $chapter but I'm normally used to the first part as being "If $chapter matches 5 then do something". Please accept my apologies ahead of time because this may be crazy simple but what is this statement doing?