Which Fortran version to learn

[Winzer]

I have decided to learn Fortran over the summer. However there are various versions out there.
Which version would you recommend learning? I will be using Fortran for computation in physics
primarily. I will also be interfacing Python and Fortran together.

 

[Winzer]

This is not an unreasonable request is it?
Given the fortran versions: 77,90,95... which one would you recommmend?
Why would you recommend that particular version over any other?

 

[Winzer]

I have just read that it easiest to start with fortran 77, then to work my way up from there.
The reason being that the newer versions have more sophisticated packages, etc.
Is this accurate?

 

[minger]

I would say that there is no reason to start with anything older than Fortran 90. Fortran 90 starting going towards object-oriented programming, and quite frankly, if you try to debug anything written in F77, you'll quickly find yourself pulling your hair out.

Common blocks and implicit variable declaration will start you down a path you don't want to go.