"?", ASCII character 63. Common names: querYITU-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 Unixshell file name patterns, question mark matches anY single character. (2003-06-17)