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@ogawa_shuzo_cw(ogawa0706)

正規表現で数値かを判定

Last updated at Posted at 2025-06-07

正の整数かを判定する正規表現

^[0-9]+$
マッチする文字列：12345
マッチしない文字列：12345円、12.345

小数点を含む正の整数かを判定する正規表現

^\d+.\d+$
マッチする文字列：12345、12.345
マッチしない文字列：$12.345

以上です。

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