why is every whole number an integer?

Answer 1

That's the definition of integer.

http://www.mathsisfun.com/whole-numbers.html

Answer 2

Because integers are negative or positive whole numbers they can never be rational or irrational numbers.

Answer 3

Thanks you Ms. Sue for the info. and thank you Sonya for including that! :)

Answer 4

You're welcome, Laruen.

Answer 5

Sonya --- integers can be rational numbers