Many people include the years they were at University as part of their experience in various programming languages.
For example, if in your first year you learned OCAML, and that's 5 years ago, you have been programming in OCAML since 2003.
This means that any good interviewer will need to narrow down exactly what your relevant skills are, of course, so don't exaggerate and never ever tell an outright lie on your CV. In some (usually large) companies (and in some countries more than others) that can be grounds for dismissal without notice even 15 years later. But do remember you can include open source work and your university courses - they are every bit as relevant as the experience of someone who did not go to college but spent a couple of weeks reading "Lean Perl in 21 days" and then decided to re-write the aircraft navigation system
Always draw your curves, then plot your reading.