XL Fortran for AIX 8.1
Language Reference
A constant expression is an expression in which each operation is
intrinsic and each primary is one of the following:
 A constant or a subobject of a constant.
 An array constructor where each element and the bounds and strides
of each impliedDO are expressions whose primaries are either
constant expressions or impliedDO variables.
 A structure constructor where each component is a constant
expression.
 An elemental intrinsic function reference where each argument is a
constant expression.
 A transformational intrinsic function reference where each argument
is a constant expression.

A reference to the transformational intrinsic function NULL.
 A reference to an array inquiry function (except
ALLOCATED), a numeric inquiry function, the BIT_SIZE
function, the LEN function, or the KIND function.
Each argument is either a constant expression or it is a variable whose
properties inquired about are not assumed, not defined by an expression that
is not a constant expression, and not definable by an ALLOCATE or
pointer assignment statement.
 A constant expression enclosed in parentheses.
Any subscript or substring expression within the expression must be a
constant expression.
48.9
name('Pat','Doe')
TRIM('ABC ')
(MOD(9,4)**3.5)
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