Programming Basics - FORTRAN 77
This is called the source code. The text has to follow certain rules (syntax) to be a valid FORTRAN program. We start by looking at a simple example:.
Fortran 90 Basics
?A Fortran 90 program has the following form: ?A Fortran 90 constant may be an integer real
Programming with Fortran.pdf
If the. 'integer expression' is not equal to any integer between 1 and k the statement is not executed. In the example
Fortran 90 Subprograms
Function Syntax: 1/3. ?A Fortran function or function subprogram
Appendix C - A Fortran Primer: (and cheat sheet)
with implicit none and declare every variable. It's annoying but it keeps you honest. I will try to do this in my programs. A sample program declara-.
OpenMP-4.0-Fortran.pdf
03-Feb-2014 OpenMP API 4.0 Fortran. Page 1. OpenMP 4.0 API Fortran Syntax Quick Reference Card. Fortran. OpenMP Application Program Interface (API) is.
Parallel Programming in Fortran 95 using OpenMP
OpenMP consolidates all this into a single syntax and semantics and finally For example if 10 threads are in use
Chapter 1: Fortran Programming: Detailed Notes
be read in conjunction with the example programs. First of all how is a simple FORTRAN program structured? ... Basic Syntax for the Three Types.
A Fortran 2003 introduction by examples
The Fortran 95 syntax for the declaration of a derived datatype can be lijke the one shown here. TYPE derived ! Internal variables. INTEGER. :: counter. REAL.
A Fortran Tutorial
The text has to follow a certain syntax to be a valid. Fortran program. We start by looking at a simple example where we calculate the area of a circle:.
Fortran 90 BasicsFortran
90Basics
I don t know what the programming language I don t know what the programming language of the year 2000 will look like, but I know it will be called FORTRAN. 1Charles Anthony Richard Hoare
Fall 2010
F90 Program StructureF90
Program
Structure
A Fortran 90 program has the following form:A
Fortran
90program has the following form: program-nameis the name of that program specification part execution part and specification part execution part and subprogram-partare optional.
Althou
g h IMPLICIT NONEis also o p tional this is g p, required in this course to write safe programs.PROGRAMprogram-name
IMPLICIT NONE[
ifi ti t spec ifi ca ti on- p ar t [execution-part] subprogram part 2 subprogram partEND PROGRAMprogram-name
Program CommentsProgram
Comments
Comments start with a
Comments
start with aEverything following !will be ignored
This is similar to
in C/C++ This is similar to in C/C++ ! This is an example!PROGRAM Comment
READ(*,*) Year ! read in the value of Year.......... .......... Year = Year + 1 ! add 1 to YearEND PROGRAM Comment
3END PROGRAM Comment
Continuation LinesContinuation
LinesFortran 90 is not completely format
free!Fortran
90is not completely format free!
A statement must starts with a new line.
If t t t i t l t fit li it h
If a s t a t emen t i s t oo l ong t o fit on one li ne, it h as to be continued.The continuation character is &, which is not
part of the statement.Total = Total + &
Amount * Payments! Total = Total + Amount*Payments! Total = Total + Amount*PaymentsPROGRAM & iii 4 Cont i nuat i onL i ne ! PROGRAM ContinuationLineAlphabetsAlphabets
Fortran 90 alphabets include the following:Fortran 90alphabets include the following:
Upper and lower cases letters
Di it Di g it sSpecial characters
space' " ( ) * + - _ ! & $ ; < > 5Constants:
1/6Constants:
1/6A Fortran 90 constant may be an integer, real,A
Fortran
90constant may be an integer, real, logical, complex, and character string.
We will not discuss complex constants
We will not discuss complex constantsAn integer constantis a string of digits with an
optional sign 12345345
+789
+0 optional sign 12345
345
+789
+0 6
Constants:
2/6Constants:
2/6 A real constant has two forms, decimal and A real constant has two forms, decimal and exponential:In the
decimal form a real constant is a In the decimal form a real constant is a string of digits with exactly one decimal point A real constant may include anpoint A real constant may include an optional sign. Example: 2.45,.13,13., 012 12 0 12 12 7Constants:
3/6Constants:
3/6 A real constant has two forms, decimal and A real constant has two forms, decimal and exponential:In the
exponential form a real constant In the exponential form a real constant starts with an integer/real, followed by a E/e, followed by an integer ( ie the exponent) followed by an integer i e the exponent)Examples:
12E3(12 10 3 12e3
12 10 3 12E3
(12 10 3 12e3
12 10 3
3.45E-8 (3.4510
-8 ), -3.45e-8 34510 8 3 45
10 8
0E0(010
0 =0). 12.34-5is wrong! 8Constants:
4/6Constants:
4/6 A lo g ical constant is either .TRUE.or .FAL S E. g SNote that the periods surrounding TRUEand
FALSE are required! FALSE are required! 9Constants:
5/6Constants:
5/6 A character string or character constant is a A character string orquotesdbs_dbs14.pdfusesText_20[PDF] fortran syntax pdf
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