MachineNumberQ—Wolfram Documentation

MachineNumberQ[expr]

returns True if expr is a machine‐precision real or complex number, and returns False otherwise.

Examples

open all close all

Basic Examples (1)

Check whether numbers are machine numbers or not:

Scope (1)

Complex numbers:

Complex numbers are only considered machine numbers if both real and imaginary parts are machine numbers:

Applications (1)

Solve a differential equation, stopping when out of the range of machine numbers:

Properties & Relations (1)

Possible Issues (1)

History

Introduced in 1991 (2.0)

Wolfram Research (1991), MachineNumberQ, Wolfram Language function, https://reference.wolfram.com/language/ref/MachineNumberQ.html.

Text

Wolfram Research (1991), MachineNumberQ, Wolfram Language function, https://reference.wolfram.com/language/ref/MachineNumberQ.html.

CMS

Wolfram Language. 1991. "MachineNumberQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/MachineNumberQ.html.

APA

Wolfram Language. (1991). MachineNumberQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/MachineNumberQ.html

BibTeX

@misc{reference.wolfram_2025_machinenumberq, author="Wolfram Research", title="{MachineNumberQ}", year="1991", howpublished="\url{https://reference.wolfram.com/language/ref/MachineNumberQ.html}", note=[Accessed: 22-February-2026]}

BibLaTeX

@online{reference.wolfram_2025_machinenumberq, organization={Wolfram Research}, title={MachineNumberQ}, year={1991}, url={https://reference.wolfram.com/language/ref/MachineNumberQ.html}, note=[Accessed: 22-February-2026]}