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based on an earlier version of the Wolfram Language.
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MachineNumberQ

MachineNumberQ[expr]
returns True if expr is a machine-precision real or complex number, and returns False otherwise.
Check whether numbers are machine numbers or not.
Check whether numbers are machine numbers or not.
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Complex numbers:
Complex numbers are only considered machine numbers if both real and imaginary parts are machine numbers:
Solve a differential equation, stopping when out of the range of machine numbers:
Any machine number has precision given as MachinePrecision:
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