Question

Are all integers also in real numbers? Why?

Answer 1

Fractions and decimals are not integers. All whole numbers areintegers (and all natural numbersare integers), but not all integers are whole numbers or natural numbers. For example, -5 is aninteger but not a whole number or a natural number.

Answer 2

Yes. Integers includes a non-fractional number that can be positive (1,2,3), negative (-1,-2,-3), or zero. Real numbers can be written as decimals, including rational and irrational numbers.e.g. -2.5, -1, 0, etc.