!3 You can assert that a numeric value is within a given range using the optional !-IntegralRangeHandler-!.
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First, make sure to load the handler as it is not loaded by default.

!|cell handler loader|
|load|IntegralRangeHandler|

Type the low end of the range, ".." and the high end and the cell will turn green if the actual value is within that range.

|int fixture|
|field|field?|property|property?|set|get?|
|256  |0..256|5       |4..7     |9  |3..9|
|0    |-12..37|-19    |-256..0  |-1 |-12..12|