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MachineNumberQ$MachineEpsilon

$MachinePrecision

FilledSmallSquare$MachinePrecision gives the number of decimal digits of precision used for machine-precision numbers.

FilledSmallSquare A typical value of $MachinePrecision is 16.

FilledSmallSquare$MachinePrecision gives the default precision assumed for approximate real numbers where few explicit digits are entered.

FilledSmallSquare$MachinePrecision is the default precision used by N and other numerical functions.

FilledSmallSquare See The Mathematica Book: Section 3.1.4 and Section 3.1.6.

FilledSmallSquare See also: $MachineEpsilon, $MinMachineNumber, $MaxMachineNumber.

FilledSmallSquare Related package: NumericalMath`ComputerArithmetic`.

MachineNumberQ$MachineEpsilon