IBM C28-6571-1 PL I Language Specifications Jul65 free download

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File No. S360-29 Form C28-6571-1 Systems Reference Library IBM Operating System/360 PL/I: Language Specifications This manual is a description of the full facilities of PL/I to be implemented under Operating System/360. However, the reader should not assume that all facilities will be available at initial release. Manuals for specific System/360 implementations will be released later. Another publication will be issued spec- ifying a subset of the facilities of the language described in this manual. This subset is planned for implementation under the Basic Operating System/360 and Basic Program Support for System/360. MAJOR REVISION (JULY, 1965) This publication, Form C28-6571-1, is a major reV1S10n of the previous edition, Form C28-6571-0. This new edition reflects a number of significant changes in the language. The sections containing these changes are indicated by a dot (e) to the left of the subject heading in the Table of Contents. In addition to the technical changes, certain organizational changes have been made. Additional chapters (Chapters 5 and 6) have been formed from material previously contained in Chapter 1. The information on attributes, declarations, and scope of declarations, also previously contained in Chapter 1, has been incorporated into Chapter 4. This publication was prepared for production using an IBM computer to update the text and to control the page and line format. Page impressions for photo- offset printing were obtained from an IBM 1403 Printer using a special print chain. Copies of this and other IBM publications can be obtained through IBM Branch Offices. A form for readers' comments appears at the back of this publication. It may be mailed directly to IBM. Address any additional comments concerning this publication to the IBM Corporation, Programming Systems publications, Department D39, 1271 Avenue of the Americas, New York, N. Y., 10020. C 1965 by International Business Machines Corporation CONTENTS INTRODUCTION 9 Base