function fizzBuzz(num) { if (typeof num !== 'number' || num == undefined ) { return false } let a = num % 3 == 0 ? 2: 1; let b = num % 5 == 0 ? 8: 4; let obj = { 5: num, 6: 'fizz', 9: 'buzz', 10: 'fizzbuzz' } return obj [a+b ] }