# Where to find a summary for Q functions? [duplicate]

Is there a summary for all Function like
NumberQ, LetterQ and so forth?

data=123;
IntegerQ[data]

True

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## marked as duplicate by rm -rf♦Mar 7 '13 at 14:58

Do you mean a list of functions ending in Q?

?*Q


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(+1) or ?**Q to get all 1243 functions. –  kguler Mar 7 '13 at 13:55
There is an example like this in the documentation page on Information. Typing "?" in help is useless :( (it does not bring you to Information). Also the syntax is so special that you cannot do something like Hold[?*Q]//FullForm to find out what function is being used. So I figured I'd post this. –  Jacob Akkerboom Mar 7 '13 at 14:11
Of course, not all of these are querying functions. EllipticNomeQ[], LegendreQ[], and MarcumQ[]` are examples that spring to mind. –  Ｊ. Ｍ. Apr 16 '13 at 13:24