DATA statement is:
DATA nlist / clist /, nlist / clist /, ...
Where nlist is a list of variable names, array names, substring names, and
implied-DO lists, and clist is a list of items which may be literal or named constants
or either of these preceded by a repeat-count and an asterisk. The repeat-count can
also be an unsigned integer constant or named constant.
The comma which precedes each list of names except the first is optional. An
implied-DO list has the general form:
( dlist, intvar = start, limit, step )
Where em dlist is a list of implied-DO lists and array elements; intvar is an integer
variable called the loop-control variable; start, limit, and step are integer expressions
in which all the operands must be integer constants or loop-control variables of outer
implied-DO lists.
DATA statements cannot be used to initialise items in the blank common block;
items in named common blocks can only be initialised within a BLOCK DATA program
unit (see section 12.4).
The DATA statements in each program unit must follow all specification
statements but they can be interspersed with executable statements and statement
function statements. It is, however, best to follow the usual practice of putting all
DATA statements before any of the executable statements.
