Over the centuries mathematicians have come to recognise that it's useful to talk about different types of number. These include:

As time has gone by, the usual number line has been extended, and we can also talk about:

AGentleIntroductionToTimeComplexity CountableSet DifferenceOfTwoSquares	(none)			FermatPrime
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SquareNumber			AddingRealNumbers FermatNumber
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		⇌	You are here TypesOfNumber
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			AlgebraicNumber CategoryMetaTopic ComplexNumber CountingNumber ImaginaryNumber Integer IrrationalNumber PerfectNumber PrimeNumber Quaternion RationalNumber RealNumber TranscendentalNumber WholeNumber
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DifferenceOfTwoSquares	(none)			AddingComplexNumbers ArgandDiagram CategoryMeta CauchySequence Commutative ComplexConjugate ComplexPlane CompositeNumber ContinuedFraction CountableSet CubeRoot DedekindCut Denominator DividingComplexNumbers Divisor Euclid Euler MersennePrime MultiplyingComplexNumbers NaturalNumber Numerator PolarRepresentationOfAComplexNumber Polynomial PrimePair Pythagoras ReducingFractionsToLowestTerms RootTwoIsIrrational ScalarProduct SquareRoot Vectors

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Types Of Number