Guide To Learn
Like I mentioned earlier, procedures allow you to define snippets of code as their own self-contained units of functionality. You can then use them and reuse them as much as you need, by passing different values of input parameters and getting the results back. They’re similar to the main program, in that they can include […]
When I introduced program as the main Fortran program unit in the previous chapter, I also mentioned a few others: functions, subroutines, and modules. Functions and subroutines, which are the focus of this chapter, are both kinds of procedures. A procedure is a miniprogram that can be called any number of times from the main program, or […]
In the previous chapter (section 2.2.2), I introduced the example of a cold front to illustrate the concepts of temperature gradient (change in space) and tendency (change in time). There, I asked you to calculate the change of temperature in Miami, considering the temperatures in Atlanta and Miami, the distance between them, and the speed of the front (figure 3.4). Figure […]
In the previous chapter, we made the first working version of what will become a realistic water wave simulator. Contained in a single program, it included data declaration and initialization, arithmetic expressions and assignment to calculate the solution, a do loop to advance the solution forward in time, and a print statement to output the results to screen. With 26 lines […]
Simple is better than complex. Complex is better than complicated. –Tim Peters, The Zen of Python Although a mantra of Python, the opening quote applies well to Fortran and programming in general. We always aim for simple, whenever possible. This is especially true in software design, where we often deal with increasingly complex systems. Simple […]