question mark

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question mark

Question marks ( ? ) are used to identify sentences that ask a question (technically known as interrogative sentences). They almost always appear at the end of a sentence, marking its conclusion (though there is a specific exception to this rule).
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question mark:

see punctuationpunctuation
[Lat.,=point], the use of special signs in writing to clarify how words are used; the term also refers to the signs themselves. In every language, besides the sounds of the words that are strung together there are other features, such as tone, accent, and pauses,
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question mark

(character)
"?", ASCII character 63.

Common names: query; ITU-T: question mark; ques. Rare: whatmark; INTERCAL: what; wildchar; huh; hook; buttonhook; hunchback.

Question mark is used, along with colon for C's lazy triadic "if" operator (similar to the IIF function in Visual Basic). The expression x?y:z evaluates x, then if x is true it returns y else it returns z.

In Unix shell file name patterns, question mark matches any single character.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

question mark

In C programming, the question mark is used as a conditional symbol. For example, in the expression x1 ? x2 : x3, if x1 is not zero, then x2 is evaluated, otherwise x3 is evaluated.
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