• Reference Guide

Is Identical

x === y
The operator compares the values x and y. If the both values are of the same type and are equal, the operator returns TRUE, otherwise FALSE. If the specified values are not of the same type, no conversion is performed and the operator returns FALSE immediately. If a comparison with conversion is desired, it is necessary to use the operator == instead.
[Int]0 == [Real]0
returns TRUE, because the first number is converted to a real number first, while
[Int]0 === [Real]0
returns FALSE, because the numbers are of distinct types.