This is documentation for Mathematica 3, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
 Documentation / Mathematica / Built-in Functions / Numerical Computation / Numerical Precision  /
MachineNumberQ

  • MachineNumberQ[ expr ] returns True if expr is a machine-precision real or complex number, and returns False otherwise.
  • See the Mathematica book: Section 3.1.4.
  • See also: Precision, NumberQ.
  • Related package: NumericalMath`ComputerArithmetic`.