Get an ordinal from a number

ordinal.js

/**
 * Get ordinal value
 *
 * @param n {number} if a string is provided, % will attempt to convert to number
 * @returns {string} th, st, nd, rd
 */
function getOrdinal(n) {
	var ordArr = ['th', 'st', 'nd', 'rd'];
	var modulus = n % 100;

	return ordArr[(modulus - 20) % 10] || ordArr[modulus] || ordArr[0];
}