Precision & Accuracy Control

The Wolfram Language has sophisticated built-in automatic numerical precision and accuracy control. But for special-purpose optimization of numerical computations, or for studying numerical analysis, the Wolfram Language also allows detailed control over precision and accuracy.

N numerical evaluation to specified precision and accuracy

PrecisionGoal, AccuracyGoal precision and accuracy goals for computations

WorkingPrecision precision to use inside algorithms

Precision find the precision of a number

Accuracy find the accuracy of a number

Chop set sufficiently small numbers or imaginary parts to zero

SetPrecision, SetAccuracy reset precision or accuracy of a number

$MinPrecision, $MaxPrecision settable global precision bounds

$MaxExtraPrecision maximum extra precision to use inside exact algorithms

Machine Numbers

MachinePrecision symbol representing machine precision

MachineNumberQ test if a number is a machine number

$MachinePrecision  ▪  $MachineEpsilon  ▪  $MinMachineNumber  ▪  $MaxMachineNumber