Is negative 9 a natutal number

Integers are like whole numbers, but they also include negative numbers ... but still no fractions allowed! We can put that all together like this: Integers = { ..., - 5, - 4, - 3, - 2, - 1, 0, 1, 2, 3, 4, 5, ... }

No it is only an integer because integers and rational numbers only include negatives