Control Structures
Steve Lantz, Adam Brazier (revisions)
Cornell Center for Advanced Computing
Revisions: 2/2023, 10/2014, 6/2012 (original)
Like any programming language, Fortran necessarily includes syntax for branching and looping. Here we show you how to create the basic types of control structures: if-then-else, as well as loops governed by a counter, a condition, or a combination of both.
Objectives
After you complete this topic, you should be able to:
- Identify essential control constructs in Fortran
- Write an
ifcondition followed bythenandelseclauses - Show how
else ifis used to insert additional clauses - Explain where to use a
doloop and awhileloop - Show how to break out of a loop conditionally
- Create any type of branch or loop structure
Prerequisites
- Familiarity with an editor
- Knowledge of how to execute simple commands on the command line
- Some basic understanding of what a computer language is
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Cornell University
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Center for Advanced Computing
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CVW material development is supported by NSF OAC awards 1854828, 2321040, 2323116 (UT Austin) and 2005506 (Indiana University)
CVW material development is supported by NSF OAC awards 1854828, 2321040, 2323116 (UT Austin) and 2005506 (Indiana University)