Zero

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**Zero – 0**

Order	nil
Numbers: 0 1 2 3 4 5 6 7 8 9 10 20 30 40 50 60 70 80 90

Zero is a special number. If there are zero things, there are not any things. There are none.

1 Example
2 Symbol
3 Arithmetic with Zero
4 History
5 Less Simple
6 References

[edit] Example

John has zero hats. John has no hat. John does not have a hat.

[edit] Symbol

The symbol for the number zero is "0".

[edit] Arithmetic with Zero

Zero is a special number. That is because:

If you add a number to zero, you get that number. For example, if you add three to zero, you get three. In symbols:

3 + 0 = 3

If you subtract zero from a number, you get that number. For example, if you subtract zero from three, you get three. In symbols:

3 - 0 = 3

If you multiply a number with zero, you get zero. For example, if you multiply forty three with zero you get zero. In symbols:

43 x 0 = 0

You can't divide a number by zero. That is against the rules of arithmetics. If you divide any number by zero with a calculator, you get an error.

[edit] History

The number zero might have come from India.

[edit] Less Simple

The number zero is not a positive number. The number zero is not a negative number. The number zero is a whole number. The number zero is not usually an ordinal number^[1] The number zero is an even number. Any number divided by itself yields a result of one, except if that number is zero. In symbols:

0 ÷ 0 = "not a number."

When measuring time, zero means "now'. For example, John is counting the time to an event. John counts "..., T minus 3, T minus 2, T minus 1, T minus 0". The time "T minus 0" is the same as the time of the event. If John is counting the time since an event, John counts "T plus 1, T plus 2, T plus 3,..."