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‼ (a double exclamation mark, Unicode character U+203C) may refer to: *A brilliant move in chess notation *The double factorial operator in mathematics *A "convert to Boolean" construction in some computer languages, this is through a computer type of double negation, where its Boolean value is negated, then negated again, converting the value to either true or false *An operator for fetching list elements in the programming language Haskell *A retroflex click, a family of click consonants found only in Juu languages of southern Africa and in the Damin ritual jargon of Australia The ‼ character can be typed on Microsoft Windows operating systems by using the key combination ALT+19, or in simple form, holding the ALT key and typing the numbers 1 and 9 on the number pad. == See also == * !!! * ! (disambiguation) hu:Faktoriális#Hasonló függvények ru:Факториал#Двойной факториал 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「!!」の詳細全文を読む スポンサード リンク
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