operator is used in logical expressions to test whether a repeating item is within a set of values or ranges. The item can be numeric or alphanumeric. A range of values is separated by a colon, for example 1:5
. Elements of a list of values or ranges are separated by commas, for example 1, 3:5, 7
This function is similar to the in
operator except that it works on repeating items. It thus tests whether a group of items contains certain values.