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☆ A M B ☆
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Range doesn’t do that; it allows the field to be within a certain range of numeric values (such as anything between 1 and 10)
# #RANGE - a comma separated list of numbers or numeric ranges. When setting a range the order is not important. 1~10 or 10~1 will both validate a number between 1 and 10 (inclusive). Handles negative as well as positive numbers
example: #RANGE 1,3,-5~-15,60~82
You’ll need to use #FUNCTION or #REGEX.
Using #REGEX should look something like this (although I have no more than a passing acquaintance with regular expressions!)