Undefined

Undefined

is a symbol that represents a quantity with no defined value.

Details

Examples

Basic Examples  (2)

ConditionalExpression with False condition evaluates to Undefined:

The number of solutions depends on the value of x:

For x=1 only the first solution is defined:

Mathematical expressions containing Undefined evaluate to Undefined:

Wolfram Research (2010), Undefined, Wolfram Language function, https://reference.wolfram.com/language/ref/Undefined.html.

Text

Wolfram Research (2010), Undefined, Wolfram Language function, https://reference.wolfram.com/language/ref/Undefined.html.

BibTeX

@misc{reference.wolfram_2020_undefined, author="Wolfram Research", title="{Undefined}", year="2010", howpublished="\url{https://reference.wolfram.com/language/ref/Undefined.html}", note=[Accessed: 18-April-2021 ]}

BibLaTeX

@online{reference.wolfram_2020_undefined, organization={Wolfram Research}, title={Undefined}, year={2010}, url={https://reference.wolfram.com/language/ref/Undefined.html}, note=[Accessed: 18-April-2021 ]}

CMS

Wolfram Language. 2010. "Undefined." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Undefined.html.

APA

Wolfram Language. (2010). Undefined. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Undefined.html