$NoValue

$NoValue

InitializationValue[…]オブジェクトに割り当てることができる特別な値で，初期化の値が参照するシンボルが値なしで初期化されるべきであることを示す．

詳細

  • 初期化中のシンボルの設定解除は，通常InitializationValue[sym]=$NoValueで行われる．

例題

例  (1)

セッション開始時にクラウド接続の設定を解除する：

Wolfram Research (2017), $NoValue, Wolfram言語関数， https://reference.wolfram.com/language/ref/$NoValue.html.

テキスト

Wolfram Research (2017), $NoValue, Wolfram言語関数， https://reference.wolfram.com/language/ref/$NoValue.html.

CMS

Wolfram Language. 2017. "$NoValue." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/$NoValue.html.

APA

Wolfram Language. (2017). $NoValue. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/$NoValue.html

BibTeX

@misc{reference.wolfram_2024_$novalue, author="Wolfram Research", title="{$NoValue}", year="2017", howpublished="\url{https://reference.wolfram.com/language/ref/$NoValue.html}", note=[Accessed: 22-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_$novalue, organization={Wolfram Research}, title={$NoValue}, year={2017}, url={https://reference.wolfram.com/language/ref/$NoValue.html}, note=[Accessed: 22-November-2024 ]}