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$NumberMarks

gives the default value for the option NumberMarks, which specifies whether ` marks should be included in the input form representations of approximate numbers.

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$NumberMarks

$NumberMarks

gives the default value for the option NumberMarks, which specifies whether ` marks should be included in the input form representations of approximate numbers.

Details

  • The default setting for $NumberMarks is Automatic.
  • $NumberMarks=True indicates that ` should by default be used in all approximate numbers, both machine‐precision and arbitrary‐precision ones.
  • $NumberMarks=Automatic indicates that ` should by default be used in arbitrary‐precision but not machine‐precision numbers.
  • $NumberMarks=False indicates that ` should by default never be used in outputting numbers.

Examples

Basic Examples  (2)

The default value of $NumberMarks is Automatic:

Wolfram Language code: $NumberMarks

MachinePrecision numbers are shown without a number mark:

Wolfram Language code: InputForm[N[Pi]]

Arbitrary-precision numbers are shown with a mark and the precision:

Wolfram Language code: InputForm[N[Pi, 20]]

Temporarily force machine numbers to be shown with number marks:

Wolfram Language code: Block[{$NumberMarks = True}, ToString[N[Pi], InputForm]]
Wolfram Research (1996), $NumberMarks, Wolfram Language function, https://reference.wolfram.com/language/ref/$NumberMarks.html.

Text

Wolfram Research (1996), $NumberMarks, Wolfram Language function, https://reference.wolfram.com/language/ref/$NumberMarks.html.

CMS

Wolfram Language. 1996. "$NumberMarks." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$NumberMarks.html.

APA

Wolfram Language. (1996). $NumberMarks. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$NumberMarks.html

BibTeX

@misc{reference.wolfram_2026_$numbermarks, author="Wolfram Research", title="{$NumberMarks}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/$NumberMarks.html}", note=[Accessed: 13-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_$numbermarks, organization={Wolfram Research}, title={$NumberMarks}, year={1996}, url={https://reference.wolfram.com/language/ref/$NumberMarks.html}, note=[Accessed: 13-June-2026]}