I'm going to be using Fortran for research this summer (three weeks) and the one problem is I don't know Fortran. Obviously, I know I can't learn everything in three weeks but I assume it is possible to get a strong base. I already have a textbook on Fortran by Etter but possibly there are some good online resources that could be recommended. As someone who has never learned any language, I was wondering if there are any general tips (or specific tips for fortran). Thanks (hopefully you haven't answer this question too many times :) ).