Use Recursion to Create a Countdown: Why is this not working?

JavaScript
1

Tell us what’s happening:

Hi, I’m having trouble understanding why this doesn’t work, and I would really appreciate any help.
I tested the code in codepen.io and it works fine if I pass an empty array and any number as an argument, if I call the function like this:

countdown([], 5);

but if I call it using the name of the variable myArray, it doesn’t work, unless it is previously defined, like:

//This doesn’t work:
countdown(myArray, 5);
//This works:
var MyArray = [];
countdown(myArray, 5);

So I’m not sure if the variable myArray is supposed to be already defined in the example or not, especially because when I tested the proposed solution in codepen, it doesn’t work…

This is the proposed solution:

function countdown(myArray, n){
  if(n <= 0){
    return;
  }
  else{
    myArray.push(n);
    countdown(myArray, n - 1);
  }
}

This is my code so far:


//Only change code below this line
function countdown(myArray, n) {
if (n < 1) {
  return [];
} else {
  var myArray = countdown(myArray, n -1);
  myArray.unshift(n);
  return myArray;
}
}

Thanks in advance!!

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Challenge: Use Recursion to Create a Countdown

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