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DigitCharacter

StringExpressionにおける数字0–9を表す．

例題  
例  
特性と関係  
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DigitCharacter

DigitCharacter

StringExpressionにおける数字0–9を表す．

例題

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例  (2)

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

文字列が数字だけを含んでいるかどうかテストする：

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

特性と関係  (2)

DigitCharacterはDigitQがTrueを与える任意の文字にマッチする：

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

関連する定義済みの文字クラスにはLetterCharacterとWhitespaceCharacterがある：

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

テキスト

Wolfram Research (2004), DigitCharacter, Wolfram言語関数， https://reference.wolfram.com/language/ref/DigitCharacter.html.

CMS

Wolfram Language. 2004. "DigitCharacter." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/DigitCharacter.html.

APA

Wolfram Language. (2004). DigitCharacter. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/DigitCharacter.html

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: 12-October-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: 12-October-2026]}