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BASIC Language
Systems Reference Manual

This publication contains a complete description of the
BASIC programming language as it is defined by IBM.

BASIC is a terminal-oriented language used by both
progn~mmers and non-programmers for the solution of
prdblems requ iring lengthy or repetitive computations.

The syntax and semantics of BASIC are presented in
this publication for readers who are already acquainted
with the fundamental techniques and terminology of
programming. Topics covered include program struc-
ture, data representation, and statement descriptions.
Sample BASI C programs and a formalized definition
of the language are included in appendixes.
Preface


This publication contains a complete description of the BASIC programming lan-
guage as it is defined by IBM.
BASIC is a terminal-oriented language which was developed for people who wish
to solve problems of a mathematical nature, but who need not acquire expertise
in the extensive discipline of modern computer programming.
The syntax and semantics of the BASIC language are presented here for the reader
who is already acquainted with the fundamental techniques and terminology of
programming. The first section of the book describes BASIC program structure and
data representation. In the second section, the BASIC statements are grouped ac-
cording to general function (data definition, input/output, etc.) and presented
with examples of their use.
Sample BASIC programs and a formalized definition of the language are included
in appendixes.




FIRST EDITION (June 1970)
Changes are periodically made to the specifications herein; any such changes will be reported in'
subsequent revisions.
Requests for copies of IBM publications should be made to your IBM representative or to the IBM
branch office serving your locality.
A form for readers' comments is provided at the back of this publication. If the form has been
removed, comments may be addressed to IBM Corporation, Programming Publications, 1271
Avenue of the Americas, New York, New York 10020.