"?", ASCII character 63.Common names: queryITU-T: question markques.Rare: whatmarkINTERCAL: whatwildcharhuhhookbuttonhookhunchback.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)