prints as a Fortran language version of expr.


  • Standard arithmetic functions and certain control structures are translated.
  • FortranForm acts as a "wrapper", which affects printing, but not evaluation.
  • 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 Wolfram Language output.
  • No declarations are generated.


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Basic Examples  (1)

A Fortran language version of a polynomial:

A mixed numeric and symbolic expression:

Scope  (1)

Fortran formatting for an arbitrary function:

A composite power:

Applications  (1)

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

Properties & Relations  (2)

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:

Possible Issues  (1)

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

Introduced in 1988