This book assumes no prior knowledge of programming and introduces the reader to the computer language of C. By the end of this book, the reader should be acquainted with everything a programmer needs to know in order to produce simple programs in C. Reference is made to C's more complex aspects, but these are beyond the scope of this book. This book was written originally for a group of pupils, aged 11-15 years old for an after-school programming club but it is also relevant to undergraduate university students, or other adults who are completely new to the language of C.