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DigitCharacter

表示 StringExpression 中的数字符号 0–9.

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DigitCharacter

DigitCharacter

表示 StringExpression 中的数字符号 0–9.

范例

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基本范例  (2)

Wolfram Language code: StringMatchQ[#, DigitCharacter]& /@ {"1", "a", "2", "b", ".", " "}

检查一个字符串是否仅包含数字：

Wolfram Language code: StringMatchQ["1234567890", DigitCharacter ..]
Wolfram Language code: StringMatchQ["12345a678", DigitCharacter ..]

属性和关系  (2)

DigitCharacter 匹配任何的关于 DigitQ 给出 True 的符号：

Wolfram Language code: StringMatchQ[#, DigitCharacter]& /@ {"a", "1", "2", "B"}
Wolfram Language code: DigitQ[#]& /@ {"a", "1", "2", "B"}

相关的预先规定的符号类别包括 LetterCharacter 和 WhitespaceCharacter：

Wolfram Language code: m = Table[StringMatchQ[c, p], {c, {"a", "1", " "}}, {p, {LetterCharacter, DigitCharacter, WhitespaceCharacter}}]
Wolfram Research (2004)，DigitCharacter，Wolfram 语言函数，https://reference.wolfram.com/language/ref/DigitCharacter.html.

文本

Wolfram Research (2004)，DigitCharacter，Wolfram 语言函数，https://reference.wolfram.com/language/ref/DigitCharacter.html.

CMS

Wolfram 语言. 2004. "DigitCharacter." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/DigitCharacter.html.

APA

Wolfram 语言. (2004). DigitCharacter. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/DigitCharacter.html 年

BibTeX

@misc{reference.wolfram_2026_digitcharacter, author="Wolfram Research", title="{DigitCharacter}", year="2004", howpublished="\url{https://reference.wolfram.com/language/ref/DigitCharacter.html}", note=[Accessed: 13-September-2026]}

BibLaTeX

@online{reference.wolfram_2026_digitcharacter, organization={Wolfram Research}, title={DigitCharacter}, year={2004}, url={https://reference.wolfram.com/language/ref/DigitCharacter.html}, note=[Accessed: 13-September-2026]}