该规则如下：
- st与以1结尾的数字（例如1st，首先发音）一起使用
- nd用于以2结尾的数字（例如，第92个，发音为90秒）
- rd与以3结尾的数字一起使用（例如33rd，发音为三十三）
- 作为上述规则的例外，所有以11、12或13结尾的“青少年”数字都使用-th（例如，11，发音为11、112，发音为100 [和]第十二）
- th用于所有其他数字（例如，第9个，发音为第9个）。
以下Javascript代码（于14年6月重写）完成了此任务：
function ordinal_suffix_of(i) { var j = i % 10, k = i % 100; if (j == 1 && k != 11) { return i + "st"; } if (j == 2 && k != 12) { return i + "nd"; } if (j == 3 && k != 13) { return i + "rd"; } return i + "th";}0-115之间的数字的示例输出：
0 0th 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 99th100 100th101 101st102 102nd103 103rd104 104th105 105th106 106th107 107th108 108th109 109th110 110th111 111th112 112th113 113th114 114th115 115th
