The programs in this book are written in BASIC (Beginners
All-purpose SymboHc Instruction Code), which was developed
at Dartmouth College, USA, many years ago as an easy-to-learn
language particularly suitable for teaching and general use. It
was developed in the days of mainframe computers but because
of its simplicity it was an obvious choice for use when personal
computers came into existence. Its simple concepts and flexi
bility have thus introduced computer programming to millions of
people around the world.