[asplake]

Fortran is old – 1958 onwards. It has precedence here, though at what point it separated the two behaviours into mod and modulo functions I don’t know.

Edit: From what I can tell, standardised in Fortran 90, presumably older than that.

[BlueTemplar]

My point is that Fortran doesn't have precedence on math, see this comment by Austin Feller :

http://python-history.blogspot.com/2010/08/why-pythons-integ...