Placeholder
Placeholder[name]
表示带有标签 name 的占位符,标志输入的位置.
给出空占位符 .
范例
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