For a long time, the Fortran compiler in GCC complies with the Fortran 77 standard. This language seems to be very primitive today. Don't say anything else, you want to write a Do Until loop, you have to write:
10 Continue
MYWORK
IF (condition) goto 10
Worse, F77 does not have ADT's ability, which makes many software design methods developed in the 1980s that cannot be displayed in Fortran.
Fortran 90 and Fortran 95 greatly enhance the ability of Fortran, and even add certain OO capabilities. But commercial Fortran compilers are hard to get and have expensive. Good in the GNU GFortran 95 compiler will be integrated into GCC 3.5. This is undoubtedly a good news for scientific engineering computing on Linux platforms. However, it is said that in order to improve efficiency, G95 abandoned with G77's binary compatibility, so it is expected that the G77 is still the main programming language of the value calculation program on Linux for a long time.
