172-factorial-trailing-zeroes.js

/**
 * @param {number} n
 * @return {number}
 */
const trailingZeroes = function(n) {
    let result = 0;
    for(let i = 5; Math.floor(n/i) > 0; i *= 5){
        result += (Math.floor(n/i));
    }
    return result;
};