Examples: 0,7,212 and 1023 are all totality numbers

(But numbers choose ½, 1.1 and −5 space not entirety numbers.)


Counting Numbers

Counting number are entirety Numbers, yet without the zero. Due to the fact that you can"t "count" zero.

You are watching: Is -1 a whole number

*

So they room 1, 2, 3, 4, 5, ... (and for this reason on).

Natural Numbers

"Natural Numbers" have the right to mean either "Counting Numbers" 1, 2, 3, ..., or "Whole Numbers" 0, 1, 2, 3, ..., relying on the subject.

Integers

Integers room like whole numbers, however they also include an unfavorable numbers ... But still no fountain allowed!

*

So, integers can be an unfavorable −1, −2,−3, −4, ... , hopeful 1, 2, 3, 4, ... , or zero 0

We deserve to put the all together like this:

Integers = ..., −4, −3, −2, −1, 0, 1, 2, 3, 4, ...


Examples: −16, −3, 0, 1 and also 198 are all integers.

(But numbers favor ½, 1.1 and also 3.5 room not integers)


These room all integers (click come mark), and they continue left and right infinitely:


numbers/images/number-line.js?mode=int

Some world Have different Definitions!

Some human being (not me) to speak that entirety numbers can also be negative, which renders them exactly the very same as integers.

See more: Red And Purple Mixed! What Color Does Red And Purple Make ? What Color Do Purple And Red Make

And some civilization say the zero is no a entirety number. So there you go, not everyone agrees top top a an easy thing!

My Standard

I commonly stick come this:


Name
Numbers
Examples
Whole Numbers
0, 1, 2, 3, 4, ...
0, 27,398, 2345
Counting Numbers
1, 2, 3, 4, ...
1, 18, 27, 2061
Integers
... −4, −3, −2, −1, 0, 1, 2, 3, 4, ...
−15, 0, 27, 1102

And everyone agrees top top the definition of an integer, so as soon as in doubt to speak "integer".

And once you just want optimistic integers, to speak "positive integers". That is not just accurate, it provides you sound intelligent. Prefer this (note: zero isn"t hopeful or negative):

Integers = ..., −4, −3, −2, −1, 0, 1, 2, 3, 4, ... an adverse Integers = ..., −4, −3, −2, −1 confident Integers = 1, 2, 3, 4, ... Non-Negative Integers = 0, 1, 2, 3, 4, ... (includes zero, see?)

Other Numbers

For an exciting look in ~ other types of numbers review The evolution of Numbers


422,423, 1058, 1059, 2988, 2989, 3980, 3981, 3982, 5346
Number Line including and Subtracting hopeful and an adverse Numbers Number table of contents Algebra Index