Reverse a string

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('');
}