SUBLIST-NUMBER( ) Request number of elements in SDF list

The SUBLIST-NUMBER( ) function provides information on how many elements an SDF list contains. An SDF list is a string which is interpreted in accordance with the syntactical rules for operand lists in commands. Evaluation of the string with this function is meaningful only if it has the format ’(<element₁>,<element₂>,...<element_n>)’, where <element> is a sequence of _icharacters which contain no commas outside pairs of parentheses.
The IS-SDF-LIST() function can be used to check whether a string is a list.

Result type: INTEGER

SUBLIST-NUMBER( )

LIST = string_expression