Welcome to this forum!
Can we assume you’ve a thread going at comp.lang.fortran as well?
https://groups.google.com/g/comp.lang.fortran/c/iwHXOVHOwF0/m/HLcx13wWDgAJ
You ask in one of your posts, “this is my first pro-code so I don’t know what is it and how I can write it.
Can you provide some keywords or links that help me what is the above line”
Which suggests you’re starting off with what’s currently a compiler-based language, Fortran - is that correct?
Note you’ve received a bunch of great replies on both the forums, but it can all come across as rather confusing or inadequate if you’re just staring off. What may help you is if you can spend some time by yourself to go through some step-by-step how-to tutorials.
If text-based information source is ok, you can consider the information packet by Ed Jorgenson at UNLV whose content combines nicely an introduction to Fortran in conjunction with its use with a compiler such as gfortran:
http://www.egr.unlv.edu/~ed/fortran.html
If you prefer a more visual engagement, you may like the tutorials at YouTube, particularly those on gfortran with Code::Blocks integrated development environment (IDE) which, via a user interface (UI( in the form of an IDE, can make it much more of an interactive experience that you may find easier to work with:
All the best,