I agree that any Fortran programmer should use gfortran, However, gfortran is good but not bug-free, and it's helpful to get a second opinion from another compi

I agree that any Fortran programmer should use gfortran, However, gfortran is good but not bug-free, and it's helpful to get a second opinion from another compiler when your code breaks and you don't know why. Furthermore, Intel Fortran for Windows is better for creating Windows GUI programs.