# Difference between revisions of "Real number"

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A '''real number''' is a number that falls on the real number line. It can have any value. Some examples of real numbers are:<math>1, 2, -23.25, 0, \frac{\pi}{\phi}</math>, and so on. Numbers that are not real are 3i, 3+2.5i, 3+2i+2j+k, i.e. complex numbers, and quaternions. | A '''real number''' is a number that falls on the real number line. It can have any value. Some examples of real numbers are:<math>1, 2, -23.25, 0, \frac{\pi}{\phi}</math>, and so on. Numbers that are not real are 3i, 3+2.5i, 3+2i+2j+k, i.e. complex numbers, and quaternions. | ||

+ | The set of real numbers is denoted by <math>\mathbb{R}</math>. | ||

+ | |||

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+ | == See Also == | ||

+ | |||

+ | *[[Natural number]] | ||

+ | *[[Integer]] | ||

+ | *[[Rational number]] | ||

+ | *[[Irrational number]] | ||

+ | *[[Complex number]] |

## Revision as of 09:07, 22 June 2006

A **real number** is a number that falls on the real number line. It can have any value. Some examples of real numbers are:, and so on. Numbers that are not real are 3i, 3+2.5i, 3+2i+2j+k, i.e. complex numbers, and quaternions.
The set of real numbers is denoted by .