DigitQ (Built-in Mathematica Symbol)

DigitQ[string] yields True if all the characters in the string are digits in the range 0 through 9, and yields False otherwise.

Representation of Numbers (Mathematica Guide)

Mathematica handles both integers and real numbers with any number of digits, automatically tagging numerical precision when appropriate. Mathematica internally uses several ...

AlgebraicIntegerQ (Built-in Mathematica Symbol)

AlgebraicIntegerQ[a] yields True if a is an algebraic integer, and yields False otherwise.

MathLink C Functions for Exchanging ... (Mathematica Guide)

GaussianIntegers (Built-in Mathematica Symbol)

GaussianIntegers is an option for FactorInteger, PrimeQ, Factor, and related functions that specifies whether factorization should be done over Gaussian integers.

DigitBlock (Built-in Mathematica Symbol)

DigitBlock is an option for NumberForm and related functions that specifies the maximum length of blocks of digits between breaks.

RandomInteger (Built-in Mathematica Symbol)

RandomInteger[{i_min, i_max}] gives a pseudorandom integer in the range {i_min, i_max}. RandomInteger[i_max] gives a pseudorandom integer in the range {0, ...

DigitCharacter (Built-in Mathematica Symbol)

DigitCharacter represents a digit character 0\[Dash]9 in StringExpression.

AlgebraicNumberDenominator (Built-in Mathematica Symbol)

AlgebraicNumberDenominator[a] gives the smallest positive integer n such that n a is an algebraic integer.

FractionalPart (Built-in Mathematica Symbol)

FractionalPart[x] gives the fractional part of x.