Recursion: this code work very weird, better is use for loop,

Curriculum Help
1

Cuéntanos qué está pasando:
Describe tu problema en detalle aquí.
Hello Everybody, can somebody explain that behaibour

  **Tu código hasta el momento**

function countup(n) {

  if (n < 1) {
    return [];
  } else {
        console.log(n, " times ");  
    const countArray = countup(n - 1);
    
    console.log(countArray, n , " ??? ");
    
    countArray.push(n);
    return countArray;
  }
}
console.log(countup(5), "final");

This is the output

5  times 
4  times 
3  times 
2  times 
1  times 
[] 1  ??? 
[ 1 ] 2  ??? 
[ 1, 2 ] 3  ??? 
[ 1, 2, 3 ] 4  ??? 
[ 1, 2, 3, 4 ] 5  ??? 
[ 1, 2, 3, 4, 5 ] final


function rangeOfNumbers(startNum, endNum) {
if (startNum === endNum) {
  return [];
} else if (startNum < endNum) {
  const countArray = rangeOfNumbers(endNum - 1);
  //countArray.push(n);

  
  console.log(startNum);
  var inic = startNum;

  //if (typeof countArray === 'undefined') { 
  //    const countArray = (endNum-1); 
  //} 
  
  

  countArray.push("inic");
  
  startNum += 1;
  countArray = rangeOfNumbers(inic, endNum);
      
  //console.log(countArray);
  
  return countArray;
} else {
  console.log(" termino ");
  return [];
}
}
console.log(rangeOfNumbers(1 , 5));

  **Información de tu navegador:**

El agente de usuario es: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36 Edg/91.0.864.59

Desafío: Usa recursión para crear un rango de números

Enlaza al desafío:

2

I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.

You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.

Pre-formatted-text
Pre-formatted-text1356×380 401 KB

See this post to find the backtick on your keyboard.
Note: Backticks (`) are not single quotes (’).

3

Even though for loops are better for creating an array of numbers, the purpose of this lesson is to teach you how to reuse the output of a function as its own input. Sometimes, recursion can be used to write code that would be more difficult to read and understand if written as a loop.

// recursive function
function countup(n) {
  let currentCount = n - 1; // count for current recursion
  let isLessThanOne = n < 1; // current count == 0

  if (isLessThanOne){
    return []; // end recursion when (n) == 0
  }
  let previousArray = countup(currentCount); // get array from last output
  let currentArray = [...previousArray]; // use last output as new array
  currentArray.push(n); // add new number to new array
  return currentArray; //  use array for next input
}
4

Careful, missing a brace here.