Subscripted symbolic parameters

Subscripted symbolic parameters must be coded in the format:
&PARAM(subscript)
where &PARAM is a variable symbol and subscript is an arithmetic expression. The subscript can be any arithmetic expression allowed in the operand field of a SETA instruction (arithmetic expressions are discussed in SETA instruction). The arithmetic expression can contain subscripted variable symbols. Subscripts can be nested to any level if the total length of an individual operand does not exceed 4064 characters.

The value of the subscript must be greater than or equal to one. The subscript indicates the position of the entry in the sublist that is specified as the value of the subscripted parameter (sublists as values in macro instruction operands are fully described in Sublists in operands).