BooleanQ

BooleanQ[expr]

如果 expr 为 True 或者 False，则返回 True .

范例

基本范例  (1)

对于 True 或 False，BooleanQ 给出 True：

对于其它，则给出 False：

Wolfram Research (2014)，BooleanQ，Wolfram 语言函数，https://reference.wolfram.com/language/ref/BooleanQ.html.

文本

Wolfram Research (2014)，BooleanQ，Wolfram 语言函数，https://reference.wolfram.com/language/ref/BooleanQ.html.

CMS

Wolfram 语言. 2014. "BooleanQ." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/BooleanQ.html.

APA

Wolfram 语言. (2014). BooleanQ. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/BooleanQ.html 年

BibTeX

@misc{reference.wolfram_2024_booleanq, author="Wolfram Research", title="{BooleanQ}", year="2014", howpublished="\url{https://reference.wolfram.com/language/ref/BooleanQ.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_booleanq, organization={Wolfram Research}, title={BooleanQ}, year={2014}, url={https://reference.wolfram.com/language/ref/BooleanQ.html}, note=[Accessed: 22-November-2024 ]}