Co-array Fortran, formerly known as F--, is an extension of Fortran 95 for parallel processing created by Robert Numrich and John Reid .

A Co-array Fortran program is interpreted as if it were replicated a number of times and all copies were executed asynchronously. Each copy has its own set of data objects and is termed an image. The array syntax of Fortran 95 is extended with additional trailing subscripts in square brackets to provide a concise representation of references to data that is spread across images.

See also

• Array programming
• Parallel programming