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).

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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