![]() One can then break the statement into two or more lines and use the continuation mark in position 6 (I mean, you put 5 spaces and then type +). Sometimes, a statement does not fit into the 66 available columns (7-72) of a single line. Loops Section (Do Loop) in the second part of this article ( Under Construction) to see a practical use of statement labels. The programmer is responsible for assigning a unique number to each label in each program (or subprogram). ![]() Typically, many loops and other statements in a single program require a statement label. Statement labels are used to mark positions in the program. This type of comment can be any place among your piece of code (look at ‘ ! THIS IS RADIUS OF THE CIRCLE’). You may also use the exclamation mark ( !) for comments. The lines that begin with a “ C” here are comments and have no purpose other than to make the program more readable. 6 Continuation of the previous line (optional) The most important rules are the column position rules: Column Position Rulesįortran has very few rules for how to format the source code. However, Fortran is not case-sensitive, so “X” and “x” are the same variable. Originally, all Fortran programs had to be written in all uppercase letters. READ (*,*) R ! THIS IS RADIUS OF THE CIRCLE Take a look at this simple piece of code: PROGRAM CIRCLE REAL R, AREAĬ THIS PROGRAM READS A REAL NUMBER R AND PRINTS C THE AREA OF A CIRCLE WITH RADIUS R. BasicsĪ Fortran program is just a sequence of lines of text. Here is a handy package of almost all the things you will need… Enjoy this article to know Abaqus Fortran basics. ![]() Furthermore, you need to know only an even smaller subset of FORTRAN to write a subroutine code in Abaqus. Its syntax is also very similar to MATLAB. ![]() Start Writing an Abaqus Subroutine : Basics & Recommendationsįortran is one of the easiest programming languages to learn because it can do virtually nothing other than basic low-level operations common to all languages. If you are newer to Abaqus subroutine, you should start from here: In Abaqus, user subroutines are primarily written in Fortran, although developing your code in C or C++ is also possible. ![]()
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