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toOrdinalSuffix javascript Code Snippet in 2023

mathintermediate

Last Updated: 1 March 2023

Takes a number and returns it as a string with the correct ordinal indicator suffix.

  • Use the modulo operator (%) to find values of single and tens digits.
  • Find which ordinal pattern digits match.
  • If digit is found in teens pattern, use teens ordinal.
const toOrdinalSuffix = num => { const int = parseInt(num), digits = [int % 10, int % 100], ordinals = ['st', 'nd', 'rd', 'th'], oPattern = [1, 2, 3, 4], tPattern = [11, 12, 13, 14, 15, 16, 17, 18, 19]; return oPattern.includes(digits[0]) && !tPattern.includes(digits[1]) ? int + ordinals[digits[0] - 1] : int + ordinals[3]; };
toOrdinalSuffix('123'); // '123rd'

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