Information technology - Programming languages - Fortran - Part 1: Base language

Scope

1 This part of ISO/IEC 1539 specifies the form and establishes the interpretation of programs expressed in the base Fortran language. The purpose of this part of ISO/IEC 1539 is to promote portability, reliability, maintainability, and efficient execution of Fortran programs for use on a variety of computing systems.

2 This part of ISO/IEC 1539 specifies
 

• the forms that a program written in the Fortran language may take,





 
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• the rules for interpreting the meaning of a program and its data,





 
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• the form of the input data to be processed by such a program, and





 
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• the form of the output data resulting from the use of such a program.

3 Except where stated otherwise, requirements and prohibitions specified by this part of ISO/IEC 1539 apply to programs rather than processors.

4 This part of ISO/IEC 1539 does not specify
 

• the mechanism by which programs are transformed for use on computing systems,





 
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• the operations required for setup and control of the use of programs on computing systems,





 
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• the method of transcription of programs or their input or output data to or from a storage medium,





 
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• the program and processor behavior when this part of ISO/IEC 1539 fails to establish an interpretation except for the processor detection and reporting requirements in items (2) to (8) of 1.5,





 
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• the maximum number of images, or the size or complexity of a program and its data that will exceed the capacity of any particular computing system or the capability of a particular processor,





 
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• the mechanism for determining the number of images of a program,





 
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• the physical properties of an image or the relationship between images and the computational elements of a computing system,





 
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• the physical properties of the representation of quantities and the method of rounding,





 
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• approximating, or computing numeric values on a particular processor, except by reference to the IEEE International Standard under conditions specified in Clause 14,





 
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• the physical properties of input/output records, files, and units, or





 
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• the physical properties and implementation of storage