The design and implementation of a logo-like interpreter

Abstract

Logo, a programming language usually associated with the teaching of mathematics, was first designed in the late 1960's in the US. Through out the years Logo has been used as an aid in the teaching of many subjects from language and music to Environmental studies. This was done as it offers an easy entry for the inexperienced users through Turtle graphics, from which they receive immediate feedback. However when it comes to using Logo to teach computer programming in computer studies, there are a number of difficulties that arise. These difficulties occur due to a number of pedagogically unsound features found in Logo. These difficulties were analysed and a Logo-like language (Llogo) was designed. An interpreter for this language was designed and implemented by using Borland's Turbo Pascal Version 7.