Arrays, Scalars, and Pure Scalars

A few definitions, from the point of view of automatic parallelization, are needed:

• An array is a variable that is declared with at least one dimension.

• A scalar is a variable that is not an array.

• A pure scalar is a scalar variable that is not aliased--not referenced in an EQUIVALENCE or POINTER statement.

Example: Array/scalar:

      dimension a(10)
      real m(100,10), s, u, x, z
      equivalence ( u, z )
      pointer ( px, x )
      s = 0.0
      ...

Both m and a are array variables; s is pure scalar. The variables u, x, z, and px are scalar variables, but not pure scalars.