IsBoolean(expression)

Category: Logical function

This function returns TRUE if the result of expression is a Boolean (either TRUE or FALSE). Otherwise, it returns FALSE.

Return value type: Boolean (TRUE/FALSE)

isboolean( [FieldA] = 200 )  //Returns TRUE if [FieldA] is 200

isboolean( [FieldA] - 199 )  //Returns FALSE (Expression is a calculation.  The result would be a numeric value.)

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