Undefined

Undefined

是一个符号,它代表一个没有定义的值的数量.

更多信息

范例

基本范例  (2)

对带有 False 条件的 ConditionalExpression 计算得到 Undefined

解的个数取决于 x 值:

x=1 而言,仅第一个解被定义:

对含有 Undefined 的数学表达式进行计算,结果为 Undefined

Wolfram Research (2010),Undefined,Wolfram 语言函数,https://reference.wolfram.com/language/ref/Undefined.html.

文本

Wolfram Research (2010),Undefined,Wolfram 语言函数,https://reference.wolfram.com/language/ref/Undefined.html.

CMS

Wolfram 语言. 2010. "Undefined." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/Undefined.html.

APA

Wolfram 语言. (2010). Undefined. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/Undefined.html 年

BibTeX

@misc{reference.wolfram_2024_undefined, author="Wolfram Research", title="{Undefined}", year="2010", howpublished="\url{https://reference.wolfram.com/language/ref/Undefined.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_undefined, organization={Wolfram Research}, title={Undefined}, year={2010}, url={https://reference.wolfram.com/language/ref/Undefined.html}, note=[Accessed: 22-November-2024 ]}