Additive Operators
Strangely enough, Perl also has the customary
+
(addition) and -
(subtraction)
operators. Both operators convert their arguments from strings to
numeric values if necessary and return a numeric result.
Additionally, Perl provides the . operator, which does string concatenation. For example:
$almost = "Fred" . "Flintstone"; # returns FredFlintstone
Note that Perl does not place a space between the strings being
concatenated. If you want the space, or if you have more than two
strings to concatenate, you can use the join
operator, described in Chapter
29. Most often, though, people do their concatenation
implicitly inside a double-quoted string:
$fullname = "$firstname $lastname";
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