$NumberMarks
✖
$NumberMarks
gives the default value for the option NumberMarks, which specifies whether ` marks should be included in the input form representations of approximate numbers.
Details
![](Files/$NumberMarks.en/details_1.png)
- 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)Summary of the most common use cases
The default value of $NumberMarks is Automatic:
![](Files/$NumberMarks.en/I_1.png)
https://wolfram.com/xid/0n45efaefu8-bmbgtf
![](Files/$NumberMarks.en/O_1.png)
MachinePrecision numbers are shown without a number mark:
![](Files/$NumberMarks.en/I_2.png)
https://wolfram.com/xid/0n45efaefu8-cemw1r
![](Files/$NumberMarks.en/O_2.png)
Arbitrary-precision numbers are shown with a mark and the precision:
![](Files/$NumberMarks.en/I_3.png)
https://wolfram.com/xid/0n45efaefu8-cvzbl0
![](Files/$NumberMarks.en/O_3.png)
Temporarily force machine numbers to be shown with number marks:
![](Files/$NumberMarks.en/I_4.png)
https://wolfram.com/xid/0n45efaefu8-oawpk7
![](Files/$NumberMarks.en/O_4.png)
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.
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.
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
Wolfram Language. (1996). $NumberMarks. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$NumberMarks.html
BibTeX
@misc{reference.wolfram_2025_$numbermarks, author="Wolfram Research", title="{$NumberMarks}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/$NumberMarks.html}", note=[Accessed: 17-February-2025
]}
BibLaTeX
@online{reference.wolfram_2025_$numbermarks, organization={Wolfram Research}, title={$NumberMarks}, year={1996}, url={https://reference.wolfram.com/language/ref/$NumberMarks.html}, note=[Accessed: 17-February-2025
]}