Placeholder

Placeholder[name]

表示带有标签 name 的占位符,标志输入的位置.

Placeholder[]

给出空占位符 .

更多信息

  • 从表达式的一个占位符移动到下一个占位符上.

范例

基本范例  (3)

创建网格式占位符,可以在其中输入:

创建网格式的已命名的占位符:

创建有命名占位符的公式:

Wolfram Research (2008),Placeholder,Wolfram 语言函数,https://reference.wolfram.com/language/ref/Placeholder.html.

文本

Wolfram Research (2008),Placeholder,Wolfram 语言函数,https://reference.wolfram.com/language/ref/Placeholder.html.

CMS

Wolfram 语言. 2008. "Placeholder." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/Placeholder.html.

APA

Wolfram 语言. (2008). Placeholder. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/Placeholder.html 年

BibTeX

@misc{reference.wolfram_2024_placeholder, author="Wolfram Research", title="{Placeholder}", year="2008", howpublished="\url{https://reference.wolfram.com/language/ref/Placeholder.html}", note=[Accessed: 21-November-2024 ]}

BibLaTeX

@online{reference.wolfram_2024_placeholder, organization={Wolfram Research}, title={Placeholder}, year={2008}, url={https://reference.wolfram.com/language/ref/Placeholder.html}, note=[Accessed: 21-November-2024 ]}