Fortran Language Reference Manual, Volume 3
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# Fortran Language Reference Manual, Volume 3

Document Number: 007-3694-004

St. Peter's Basilica image courtesy of ENEL SpA and InfoByte SpA. Disk Thrower image courtesy of Xavier Berenguer, Animatica.

Copyright © 1993, 1999 Silicon Graphics, Inc. All Rights Reserved. This manual or parts thereof may not be reproduced in any form unless permitted by contract or by written permission of Silicon Graphics, Inc.

The CF90 compiler includes United States software patents 5,247,696, 5,257,372, and 5,361,354.

LIMITED AND RESTRICTED RIGHTS LEGEND

Use, duplication, or disclosure by the Government is subject to restrictions as set forth in the Rights in Data clause at FAR 52.227-14 and/or in similar or successor clauses in the FAR, or in the DOD, DOE or NASA FAR Supplements. Unpublished rights reserved under the Copyright Laws of the United States. Contractor/manufacturer is Silicon Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94043-1389.

Autotasking, CF77, CRAY, Cray Ada, CraySoft, CRAY Y-MP, CRAY-1, CRInform, CRI/TurboKiva, HSX, LibSci, MPP Apprentice, SSD, SUPERCLUSTER, UNICOS, X-MP EA, and UNICOS/mk are federally registered trademarks and Because no workstation is an island, CCI, CCMT, CF90, CFT, CFT2, CFT77, ConCurrent Maintenance Tools, COS, Cray Animation Theater, CRAY APP, CRAY C90, CRAY C90D, Cray C++ Compiling System, CrayDoc, CRAY EL, CRAY J90, CRAY J90se, CrayLink, Cray NQS, Cray/REELlibrarian, CRAY S-MP, CRAY SSD-T90, CRAY SV1, CRAY T90, CRAY T3D, CRAY T3E, CrayTutor, CRAY X-MP, CRAY XMS, CRAY-2, CSIM, CVT, Delivering the power . . ., DGauss, Docview, EMDS, GigaRing, HEXAR, IOS, ND Series Network Disk Array, Network Queuing Environment, Network Queuing Tools, OLNET, RQS, SEGLDR, SMARTE, SUPERLINK, System Maintenance and Remote Testing Environment, Trusted UNICOS, and UNICOS MAX are trademarks of Cray Research, Inc., a wholly owned subsidiary of Silicon Graphics, Inc.

IRIS, IRIX, and Silicon Graphics are registered trademarks and the Silicon Graphics logo is a trademark of Silicon Graphics, Inc.

MIPS is a registered trademark and MIPSpro is a trademark of MIPS Technologies, Inc. TotalView is a trademark of Bolt Baranek and Newman Inc. UNIX is a registered trademark in the United States and other countries, licensed exclusively to X/Open Limited. UNIX is a registered trademark in the United States and other countries, licensed exclusively through X/Open Company Limited. X/Open is a registered trademarkof X/Open Company Ltd. The X device is a trademark of The Open Group,

Adapted with permission of McGraw-Hill, Inc. from the FORTRAN 90 HANDBOOK, Copyright © 1992 by Walter S. Brainerd, Jeanne C. Adams, Jeanne T. Martin, Brian T. Smith, and Jerrold L. Wagener. All rights reserved. Cray Research, Inc. is solely responsible for the content of this work.

The UNICOS operating system is derived from UNIX® System V. The UNICOS operating system is also based in part on the Fourth Berkeley Software Distribution (BSD) under license from The Regents of the University of California.

## Record of Revision

Revision 2.0 |  | November 1995 |
| Original Printing. The sections in this manuals previously appeared in the CF90 Fortran Language Reference Manual, revision 1.0, publication SR-3902, and the CF90 Commands and Directives Reference Manual.
Revision 3.0 |  | May 1997 |
| This printing supports the Cray Research CF90 3.0 release running on UNICOS and UNICOS/mk operating systems, and the MIPSpro 7 Fortran 90 compiler release 7.2 running on the IRIX operating system. The implementation of features on IRIX operating system platforms is deferred.
Revision 3.0.1 |  | August 1997 |
| This online revision supports the Cray Research CF90 3.0.1 release, running on UNICOS and UNICOS/mk operating systems, and the MIPSpro 7 Fortran 90 compiler 7.2 release, running on the IRIX operating system. Includes minor updates and corrections to revision 3.0.
Revision 3.0.2 |  | March 1998 |
| This online revision supports the Cray Research CF90 3.0.2 release, running on UNICOS and UNICOS/mk operating systems, and the MIPSpro 7 Fortran 90 compiler 7.2.1 release, running on the IRIX operating system. Includes minor updates and corrections to revision 3.0.1.
Revision 3.1 |  | August 1998 |
| This online revision supports the Cray Research CF90 3.1 release, running on UNICOS and UNICOS/mk operating systems, and the MIPSpro 7 Fortran 90 compiler 7.2.1 release, running on the IRIX operating system. Includes minor updates and corrections to revision 3.0.2.
Revision 3.2 |  | January 1999 |
| This revision (007-3694-004) supports the CF90 3.2 release, running on the UNICOS and UNICOS/mk operating systems, and the MIPSpro 7 Fortran 90 7.3 release, running on the IRIX operating system. It includes major updates to revision 3.1.

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