This book introduces computer programming to a beginner using Pascal language. Pascal has been recognized by academics all over the world as the language to be used to introduce programming to beginners. The clean structure of Pascal and the rich data structures available in the language make it an excellent language to teach programming. The version of Pascal used in the book is the one standardized by the International Standards Organization. The current book is an improved version of the earlier edition and every chapter has been checked and refined. All programs have been checked out.