Create a single value array in JavaScript

Question

why is the following code showing undefined? Are we not allowed to create an array with a single value? Putting two values won\'t show this error. Is this a pro

Answer 1

Here is my solution.

    var tech = new Array(); //create an empty array
    tech.push(21); //Append items to the array
    console.log(tech); // console array the array

Be careful to avoid this; var array = new Array(n), this creates an empty array of length n, then if you push; you will simply append the new item to the end of the array and the new array length will be n+1 and your new array will look like this array = [Empty*21,new item ]