is a special value that can be assigned to an InitializationValue […] object to indicate that the symbol referenced by the initialization value should be initialized with no value.
$NoValue
is a special value that can be assigned to an InitializationValue […] object to indicate that the symbol referenced by the initialization value should be initialized with no value.
Details
- Unsetting symbols during initialization is typically done with InitializationValue [sym]=$NoValue.
Examples
Basic Examples (1)
Unset the cloud connection at the start of a session:
See Also
Related Guides
History
Text
Wolfram Research (2017), $NoValue, Wolfram Language function, https://reference.wolfram.com/language/ref/$NoValue.html.
CMS
Wolfram Language. 2017. "$NoValue." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$NoValue.html.
APA
Wolfram Language. (2017). $NoValue. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$NoValue.html
BibTeX
@misc{reference.wolfram_2025_$novalue, author="Wolfram Research", title="{$NoValue}", year="2017", howpublished="\url{https://reference.wolfram.com/language/ref/$NoValue.html}", note=[Accessed: 09-January-2026]}
BibLaTeX
@online{reference.wolfram_2025_$novalue, organization={Wolfram Research}, title={$NoValue}, year={2017}, url={https://reference.wolfram.com/language/ref/$NoValue.html}, note=[Accessed: 09-January-2026]}