icount

Read(1) Label: distinct, count,

Syntax:
icount({<data>})

Return:
Numeric. Returns the count of multiple expressions; duplicate data is counted only once, i.e., distinct count.

Parameter <data>:

Original value/original expression. Usually multiple parameters used together, i.e., number of parameters >= 1. Required parameter; type is simple data type; parameter name omitted.

Example:
Distinct count of "Class 2", "Class 3", "Class 3".

NLC snippet: icount("Class 2","Class 3","Class 3") // returns 2.