At least the following families: all integers; all positive integers; all odd integers; and all "square integers", that is, integers that are squares of other integers.
Negative integers, rationals and real numbers
rational
Rational
Positive numbers
Rational
Irrational
A half belongs to the positive fractions family, which comes under fractions, which comes under the large family of rational numbers.
irrational
Rationals and the reals, themselves.
Numbers that include real numbers are natural numbers, whole numbers, integers, rational numbers and irrational numbers.
Integers is one possible answer.
RATIONAL , doing the same program .