SetAccuracy
 Usage
• SetAccuracy[expr, a] yields a version of expr in which all numbers have been set to have accuracy a.
Notes
• 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. • SetAccuracy returns an arbitrary-precision number even if the number of significant digits obtained will be less than $MachinePrecision. • When expr contains machine-precision numbers, SetAccuracy[expr, a] can give results which differ from one computer system to another. • 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. • 0.004``25 generates a number with all trailing digits zero and accuracy 25 on any computer system. • SetAccuracy[expr, a] does not modify expr itself. • New in Version 2.
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