ts OSI 1538 International Standard Programming languages --- ALGOL 60 Langages de programmation ALGOL 60 First edition - 1984-10-15 Frc 1/sC 2z ISO / CEI 1910-01-18 UDC 681.3.06 : 800.92 Ref. No. ISO 1538-1984 (E) ISO 1538-1984 (E) Descriptors : programming languages, aligol, specifications. Price based on 18 pages Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through iSo technical committees. Every member the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with iso, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. international Standard ISO 1538 was prepared by Technical Committee ISO/TC 97, In formation processing systems. This International Standard replaces ISO/R 1538 (withdrawn in 1977) of which it con- stitutes a revision. ISO Recommendation 1538 was a compilation of several source documents. The basic one [developed under the auspices of the International Federation for Information Pro- cessing (IFIP), whose contributions are acknowledged) was the Revised Report on the Algorithmic Language ALGOL 60. The text presented in this International Standard is based on the Modified Report on the Algorithmic Language ALGOL 60, which is a minor technical revision and a textuail clarification of the Revised Report, as established by IFIP. For reasons of iSO editorial policy the original introduction which is irrelevant to an International Standard has been deleted and some introductory clauses have been added instead. @ International Organization for Standardization, 1984 Printed in Switzerland ISO 1538-1984 (E) INTERNATIONAL STANDARD Programming Languages - ALGOL 60 Introduction requirements and rules for executing programs on an 0 actual data processing system. In this International Standard consistent use is made of ALGOL 60 as the name of the language, rather than just ALGOL, in order to avoid confusion with ALGOL 68 which is a Reference 2 completely different language. It is recommended that the language defined in this International Standard be referred to iSO/TR1672,HardwarerepresentationofALGOLbasicsym as STANDARD ALGOL 60. bols in the /sO 7-bit coded character set for information pro- cessing interchange. Whenever the name ALGOL is used in this International Stan dard it is to mean ALGOL 60, not ALGOL 68, unless it is clear from the context that no specific language is indicated. 3 Definitions For the purpose of this International Standard the following definitions apply: Scope and field of application 3.1 valid program: A text written in the ALGOL 60 This tnternational Standard defines the algorithmic program- language that conforms to the rules for a program defined in ming language ALGOL 60. Its purpose is to facilitate inter- this International Standard. change and promote portability of ALGOL 60 programs be- tween data processing systems. 3.2 2non-valid program: A text that does not conform, but was intended to be a program. ALGOL 60 is intended for expressing a large class of numerical processes in a form sufficiently concise for direct automatic translation into the language of programmed automatic com- 3.3 processor: A compiler, translator or interpreter, in com- puters. bination with a data processing system, that accepts an in- tended program, transcribed in a form that can be processed by This International Standard specifies: that data processing system, reports whether the intended pro- gram is valid or not, and if vatid executes it, if that is being the syntax and semantics of ALGOL 60; requested. a