function reverse(str) { console.log(str.length) let revArr = [] for (let idx = str.length - 1; idx > 0 ; idx--){ revArr.push(str[idx]); //revArr[str.length-1-idx] = str[idx] } return revArr.join('') } console.log(reverse("hello")) function reverseUdemy(str) { if(!str || str.length < 2 || typeof str != 'string'){ return 'hmm that is not good'; } const backwards = []; return backwards.join('') } function reverse2(str) { return str.split('').reverse().join(''); }