Test for front end engineers

I'm starting with a warm-up exercise.

Create a function to reverse a string

My answer

// reverse('Hello'); // olleH
const testString = "Hello";

function reverse(str) {
    const len = str.length;
    let newstr = "";

    for (let i = (len - 1); i >= 0; i--) {
        newstr += str[i];
    }
    return newstr;
}

reverse(testString);

Example answer

// reverse('Hello'); // olleH
const testString = "Hello";

function reverse(str) {
    return str.split("").reverse().join("");
}

reverse(testString);