The membership operator tests whether a string or integer expression is one of the values in the square set brackets [].

bIsWeekendName = sDayName in ['Saturday','Sunday']
bIs31DaysMonth = MonthOf(nDate) in [1,3,5,7,8,10,12]

When dealing with integers, you can use one or more ranges (ranges are not defined for string nor boolean data types):

bIsTeeenager = nAge in [13..19]
bIsWorldWarYear = nYear in [1914..1918, 1939..1945]

Note that invisible character tokens are treated as single characters.

Topic 121500, last updated on 04-May-2021