Whole number là gì

Examples: 0, 7,212 và 1023 are all whole numbers

(But numbers like ½, 1.1 & −5 are not whole numbers.)


Counting Numbers

Counting Numbers are Whole Numbers, but without the zero. Because you can"t "count" zero.

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So they are 1, 2, 3, 4, 5, ... (& so on).

Natural Numbers

"Natural Numbers" can mean either "Counting Numbers" 1, 2, 3, ..., or "Whole Numbers" 0, 1, 2, 3, ..., depending on the subject.

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Integers

Integers are like whole numbers, but they also include negative sầu numbers ... but still no fractions allowed!

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So, integers can be negative −1, −2,−3, −4, ... , positive 1, 2, 3, 4, ... , or zero 0

We can put that all together lượt thích this:

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


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

(But numbers like ½, 1.1 & 3.5 are not integers)


These are all integers (click to lớn mark), and they continue left & right infinitely:


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

Some People Have sầu Different Definitions!

Some people (not me) say that whole numbers can also be negative, which makes them exactly the same as integers.

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And some people say that zero is NOT a whole number. So there you go, not everyone agrees on a simple thing!

My Standard

I usually stick to lớn 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 on the definition of an integer, so when in doubt say "integer".

And when you only want positive integers, say "positive sầu integers". It is not only accurate, it makes you sound intelligent. Like this (note: zero isn"t positive or negative):

Integers = ..., −4, −3, −2, −1, 0, 1, 2, 3, 4, ... Negative sầu Integers = ..., −4, −3, −2, −1 Positive sầu Integers = 1, 2, 3, 4, ... Non-Negative sầu Integers = 0, 1, 2, 3, 4, ... (includes zero, see?)

Other Numbers

For an interesting look at other types of numbers read The Evolution of Numbers


422,423, 1058, 1059, 2988, 2989, 3980, 3981, 3982, 5346
Number Line Adding & Subtracting Positive sầu & Negative sầu Numbers Number Index Algebra Index

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