Answer: How do I concatenate a string? contributed by davido For simple concatenation, my $foo = "Foo"; my $bar = "Bar"; my $string = $foo . $bar; # $string contains "FooBar". [download] For concatenating the new string to the end of the existing string (appending): my $foo = "Foo"; my $bar = "Bar"; $foo .= $bar; # $foo now contains "FooBar" [download] For concatenating multiple strings all at once, use join. Join is (according to the Camel book) the most efficient way to concatenate many strings together. Join can be used with a delimiter, or with a null string as the delimiter, so that nothing is inserted between the strings that are joined (concatenated) together. my $this = "This"; my $that = "That"; my $the = "The"; my $other = "Other"; my $string = join "", $this, $that, $the, $other; # $string now contains "ThisThatTheOther". [download] Join can do a lot more than just simple concatenation. Whatever you put between the quotes will be inserted between the strings that are being joined together. Also, join can accept not just a list of scalar variables, but also an array, or a list of literal strings.

Answer: How do I concatenate a string? contributed by toolic Interpolation using double quotes, for example, (see Quote and Quote like Operators) can be used to concatenate 2 (or more) scalar variables into a 3rd scalar variable: my $s1 = 'Perl'; my $s2 = 'Monks'; my $s3 = "$s1$s2"; print "$s3\n"; # $s3 contains 'PerlMonks' [download] or using this syntax: my $s3 = "${s1}${s2}"; [download] Interpolation of array variables can also be performed to concatenate all element of the array into a string. It is necessary to unset the LIST_SEPARATOR ($") special variable, and it is good practice to localize this change to its own block: { undef $"; my @strs = 'a' .. 'e'; my $s4 = "@strs"; print "$s4\n"; # $s4 contains 'abcde' } [download]

Please (register and) log in if you wish to add an answer