Positive

Positive[x]

如果 x 是一个正数，给出 True.

更多信息

  • 如果 x 明显是一个负数值、复数量或零，Positive[x] 给出 False. 否则，它不进行计算.

范例

基本范例  (1)

不同类型数的运算：

非 NumericQ 的数量保持不计算的形式：

Wolfram Research (1988)，Positive，Wolfram 语言函数，https://reference.wolfram.com/language/ref/Positive.html.

文本

Wolfram Research (1988)，Positive，Wolfram 语言函数，https://reference.wolfram.com/language/ref/Positive.html.

CMS

Wolfram 语言. 1988. "Positive." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/Positive.html.

APA

Wolfram 语言. (1988). Positive. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/Positive.html 年

BibTeX

@misc{reference.wolfram_2024_positive, author="Wolfram Research", title="{Positive}", year="1988", howpublished="\url{https://reference.wolfram.com/language/ref/Positive.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_positive, organization={Wolfram Research}, title={Positive}, year={1988}, url={https://reference.wolfram.com/language/ref/Positive.html}, note=[Accessed: 22-November-2024 ]}