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Documentation / Mathematica / Built-in Functions / Numerical Computation / Numerical Precision /


FilledSmallSquare SetAccuracy[expr, a] yields a version of expr in which all numbers have been set to have accuracy a.

FilledSmallSquare When SetAccuracy is used to increase the accuracy of a number, the number is padded with zeros. The zeros are taken to be in base 2. In base 10, the additional digits are usually not zero.

FilledSmallSquare SetAccuracy returns an arbitrary-precision number even if the number of significant digits obtained will be less than $MachinePrecision.

FilledSmallSquare When expr contains machine-precision numbers, SetAccuracy[expr, a] can give results which differ from one computer system to another.

FilledSmallSquare SetAccuracy will first expose any hidden extra digits in the internal binary representation of a number, and only after these are exhausted add trailing zeros.

FilledSmallSquare 0.004``25 generates a number with all trailing digits zero and accuracy 25 on any computer system.

FilledSmallSquare SetAccuracy[expr, a] does not modify expr itself.

FilledSmallSquare See Section 3.1.5.

FilledSmallSquare See also: N, Accuracy, SetPrecision.

FilledSmallSquare New in Version 2.

Further Examples