## real numberAny number that can be represented as a, possibly infinitely long and non-repeating, decimal. Real numbers stand in one-to-one correspondence with the points on a continuous line, known as the real number line, that
stretches from zero to infinity in both directions. The set of real numbers
contains the set of all rational numbers
and the set of all irrational numbers.
The name "real number" is a retronym, coined by René Descartes
in response to the concept of imaginary
numbers. Number systems that are even more general that the real numbers
include the complex numbers and, of much more recent discovery, hyperreal
numbers and surreal numbers.
## Related categories• TYPES OF NUMBERS | |||||

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