AP Notes, Outlines, Study Guides, Vocabulary, Practice Exams and more!


Integers are the numbers that are in either (1) the set of whole numbers, or (2) the set of numbers that contain the negatives of the natural numbers. If the set of integers is denoted by I, then

I = {......, -3, -2, -1, 0, 1, 2, 3, ......}

Positive integers are the numbers in I greater than 0. Negative numbers are the numbers in I less than 0.
The number zero is neither positive nor negative, i.e., it is both nonpositive and nonnegative.

Given the above definitions, the following statements about integers can be made:

(1) N is the set of positive integers.
(2) W is the union of N and the number 0.
(3) The set of numbers that contain the negatives of the numbers in N is
the set of negative integers.
(4) I is the union of W and the set of negative integers.

Subject X2: 

Need Help?

We hope your visit has been a productive one. If you're having any problems, or would like to give some feedback, we'd love to hear from you.

For general help, questions, and suggestions, try our dedicated support forums.

If you need to contact the Course-Notes.Org web experience team, please use our contact form.

Need Notes?

While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Drop us a note and let us know which textbooks you need. Be sure to include which edition of the textbook you are using! If we see enough demand, we'll do whatever we can to get those notes up on the site for you!