Routine name maximum length in Fortran 90

Question

Does anyone know if there is a maximum length for routine names and variable names in Fortran 90?

Answer 1

Yes, the Fortran standards define a maximum length for names of things, including both routines and variables. In Fortran 90/95 the maximum length was 31 characters, in Fortran 2003 it is now 63 characters. In earlier versions it was as short as 6 characters. Your compiler may allow (non-standard) longer names.