Fortran 90

This tutorial is written in order to ease the transition from the very common and popular programming language Fortran 77 to the more modern Fortran 90. This transition uses the fact that Fortran 77 is a pure subset of Fortran 90.

When reading a chapter (or appendix) the arrows at the bottom will bring you to the previous chapter, the tutorial home page (this page, at the start of the contents) or the next chapter.

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Linköping and Novosibirsk, August 1993
Bo Einarsson and Yurij Shokin
Adapted to the Computational Physics Course by
P.L. Garrido
Granada, Mayo 1999

• Technical information
• Preface
• Introduction
• Chapters
  • 1. Notables in the transition from Fortran 77 to Fortran 90
  • 2. Specifications
  • 3. The layout of a program (free form and fix form)
  • 4. Format
  • 5. The same source code for Fortran 77 and Fortran 90 ?
  • 6. Control statements
  • 7. Program units
  • 8. Keyword arguments and default arguments
  • 9. Recursion
  • 10. Generic routines
  • 11. The use of arrays and array sections
  • 12. Pointers
  • 13. The new precision concept
  • 14. Additional problems at the transition
  • 15. Use of program libraries
  • 16. Peculiarities in the language Fortran 90
  • 17. Status of Fortran 95
  • 18. Different Fortran standards
• Answers and comments to the user exercises
• References
• Appendices
  • App. 1. Fortran and Pascal
  • App. 2. Summary of Fortran 77 statements
  • App. 3. Summary of the new features in Fortran 90
  • App. 4. Backward and Forward compatibility
  • App. 5. Intrinsic functions and subroutines in Fortran 90
  • App. 6. Fortran 90 systems
    • Apogee
    • Absoft
    • Cray
    • Digital
    • Fujitsu
    • IBM
    • Lahey
    • NAG
    • NASoftware
    • NDP
    • Pacific-Sierra
    • Portland Group
    • SunSoft
  • App. 7. The historical development of Fortran
  • App. 8. High Performance Fortran
  • App. 9. Explanation of certain terms
  • App. 10. Argument association
  • App. 11. Computer Exercises
  • App. 12. Editors
  • App. 13. Computer Environments
• Marketing information
  • The Tutorial
  • Bo Einarsson
  • Yurij Shokin

Last modified: 10 July 1998
boein@nsc.liu.se