Positive

Positive[x]

x が正の数である場合にTrueを与える．

詳細

  • Positive[x]は，x が負の数，複素数量，またはゼロであることが明白な場合にFalseを与えるが，その他の場合には未評価で残す．

例題

例  (1)

異なるタイプの数を評価する：

NumericQではない数量は未評価のまま残される：

Wolfram Research (1988), Positive, Wolfram言語関数， https://reference.wolfram.com/language/ref/Positive.html.

テキスト

Wolfram Research (1988), Positive, Wolfram言語関数， https://reference.wolfram.com/language/ref/Positive.html.

CMS

Wolfram Language. 1988. "Positive." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/Positive.html.

APA

Wolfram Language. (1988). Positive. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Positive.html

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 ]}