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conversion - Built-in way to convert Integer to Ordinal String


Is there a built-in way to convert an integer into its ordinal string representation (as per this page). That is, something akin to


{1 -> "1st", 2 -> "2nd", (*etc...*)}


or


{1 -> "First", 2 -> "Second", (*etc...*)}

Answer



The coolest way is to check the answer to this question by David Carraher. I am shamelessly stealing his code here to write a function that gives you rules for up to maxNumber:


ordinalRule[maxNumber_Integer] /; maxNumber > 0 := 
  Block[{p},
    Thread[
      Function[{x}, 
        x -> StringSplit[SpokenString[p[[#]]]][[2]] &[x] // Quiet] /@ Range[maxNumber]
  ]];


For example:


ordinalRule[100]

(*out*){1 -> "1st", 2 -> "2nd", 3 -> "3rd", 4 -> "4th", 5 -> "5th", 
 6 -> "6th", 7 -> "7th", 8 -> "8th", 9 -> "9th", 10 -> "10th", 
 11 -> "11th", 12 -> "12th", 13 -> "13th", 14 -> "14th", 15 -> "15th",
  16 -> "16th", 17 -> "17th", 18 -> "18th", 19 -> "19th", 
 20 -> "20th", 21 -> "21st", 22 -> "22nd", 23 -> "23rd", 24 -> "24th",
  25 -> "25th", 26 -> "26th", 27 -> "27th", 28 -> "28th", 

 29 -> "29th", 30 -> "30th", 31 -> "31st", 32 -> "32nd", 33 -> "33rd",
  34 -> "34th", 35 -> "35th", 36 -> "36th", 37 -> "37th", 
 38 -> "38th", 39 -> "39th", 40 -> "40th", 41 -> "41st", 42 -> "42nd",
  43 -> "43rd", 44 -> "44th", 45 -> "45th", 46 -> "46th", 
 47 -> "47th", 48 -> "48th", 49 -> "49th", 50 -> "50th", 51 -> "51st",
  52 -> "52nd", 53 -> "53rd", 54 -> "54th", 55 -> "55th", 
 56 -> "56th", 57 -> "57th", 58 -> "58th", 59 -> "59th", 60 -> "60th",
  61 -> "61st", 62 -> "62nd", 63 -> "63rd", 64 -> "64th", 
 65 -> "65th", 66 -> "66th", 67 -> "67th", 68 -> "68th", 69 -> "69th",
  70 -> "70th", 71 -> "71st", 72 -> "72nd", 73 -> "73rd", 

 74 -> "74th", 75 -> "75th", 76 -> "76th", 77 -> "77th", 78 -> "78th",
  79 -> "79th", 80 -> "80th", 81 -> "81st", 82 -> "82nd", 
 83 -> "83rd", 84 -> "84th", 85 -> "85th", 86 -> "86th", 87 -> "87th",
  88 -> "88th", 89 -> "89th", 90 -> "90th", 91 -> "91st", 
 92 -> "92nd", 93 -> "93rd", 94 -> "94th", 95 -> "95th", 96 -> "96th",
  97 -> "97th", 98 -> "98th", 99 -> "99th", 100 -> "100th"}

I don't know whether this counts as built-in though.


----EDIT----


From @Wreach's comment: there is an undocumented built-in (that SpokenString calls when dealing with numbers to ordinals) that does exactly that:



Speak["stackexchange"];
SpokenStringDump`SpeakOrdinal[121]
(*out*) 121st

In v10 I need to call Speak before the relevant function auto-loads.


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