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Built-in Mathematica Symbol

InexactNumberQ

InexactNumberQ[expr]
returns True if expr is an inexact real or complex number, and returns False otherwise.

InexactNumberQ[expr] gives True if expr has head Real, or is a complex number either of whose components have head Real.

InexactNumberQ tests whether an object is explicitly an inexact number:

An approximate zero is inexact:

Either real or imaginary parts of a complex number can be inexact:

If both real and imaginary parts are exact, then the number is not inexact:

Numbers are considered either exact or approximate (inexact):

Inexact numbers have Precision less than

Inexact numbers have head Real or Complex:

A function equivalent to InexactNumberQ: