Step-by-step explanation:
the domain is the interval or set of all valid values for the input variable (x).
this is here all real (R) values.
the range is the interval or set of all valid values for the result variable (y).
this is here all integer values.
INT(4.6) = 5
INT(-2.3) = -2
INT(sqrt(2)) = INT(1.414213562...) = 1
