I am looking for a simple interpreter that comes in a single file, and needs no installation. By simple I mean an interpreter that supports at least "<STDIN>. print, if, for, while, arrays, files and sub-routine" operations. Such a tool would be great utility for those who would like to learn programming on their own, without the hassle of installation and configuration. Is there a minimal version of Perl already available? If there isn't, I guess that the wisdom of the Perl Monks can conjure it up one in no time.