FortranForm

FortranForm[expr]
prints as a Fortran language version of expr.

The width of output lines must be set explicitly by giving the option PageWidth->n for the relevant output stream.

SetOptions[$Output, PageWidth->72] uses a line width of 72 characters for standard Mathematica output.

A Fortran language version of a polynomial:

A mixed numeric and symbolic expression:

A Fortran language version of a polynomial:

Out[1]//FortranForm=

A mixed numeric and symbolic expression:

Out[2]//FortranForm=

Fortran formatting for an arbitrary function:

A composite power:

Compute terms of the analytic Hessian for a multivariate function for use in Fortran code:

FortranForm formats expressions like Fortran code:

CForm formats expressions like C code:

Splice can be used to convert expressions in a file:

The following Fortran file contains the unevaluated integral:

Splice inserts the result of the integral:

The resulting output file:

Additional Fortran function definitions may be needed to run the code: