Array processing with SET symbols

You can use the SET statement to assign lists or arrays of values to subscripted SET symbols. For example, a list of 100 SETx values can be coded in one extended SETx statement. The extended SETx statement has the following format:
Name      Operation      Operand

&SYM(exp) SETx           X1,X2,,X4,…,Xn
where:
&SYM
is a dimensioned SET symbol
exp
is a SETA arithmetic expression
SETx
is SETA, SETB, or SETC
An operand can be omitted by specifying two commas without intervening blanks. Whenever an operand is omitted, the corresponding element of the dimensioned variable SET symbol (&SYM) is left unchanged.