Beginners always want to write this: print "The sum of three and four is: 3+4"; And they want the 3+4 part to be evaluated, so that it prints this: The sum of three and four is: 7 Of course, it's a double-quoted string, so it's not evaluated. The only things that are evaluated in double-quoted strings are variable references. There are solutions to this, but most of them are ugly. This module is less ugly. WWW: http://search.cpan.org/dist/Interpolation/