Recursion- How this function is creating an array?

Curriculum Help
1

Tell us what’s happening:
I am not able to understand how the following function is creating an array. The only thing I am able to understand is that the base case is returning an empty array.

function countup(n) {
  if (n < 1) {
    return [];
  } else {
    const countArray = countup(n - 1);
    countArray.push(n);
    return countArray;
  }
}
console.log(countup(5)); // [ 1, 2, 3, 4, 5 ]

Your code so far


// Only change code below this line
function countdown(n){
return;
}
// Only change code above this line

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Challenge: Use Recursion to Create a Countdown

Link to the challenge:

2

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