Current Perl documentation can be found at

Here is our local, out-dated (pre-5.6) version:

This is documented in the perlref manpage. In general, this is fraught with quoting and readability problems, but it is possible. To interpolate a subroutine call (in list context) into a string:

    print "My sub returned @{[mysub(1,2,3)]} that time.\n";

If you prefer scalar context, similar chicanery is also useful for arbitrary expressions:

    print "That yields ${\($n + 5)} widgets\n";

Version 5.004 of Perl had a bug that gave list context to the expression in ${...}, but this is fixed in version 5.005.

See also ``How can I expand variables in text strings?'' in this section of the FAQ.