how recursion works in javascript code example

Example 1: recursive function javascript

function pow(x, n) {
  if (n == 1) {
    return x;
  } else {
    return x * pow(x, n - 1);
  }
}

alert( pow(3, 3) ); // 27

Example 2: javascript recursion over array

function recurse(arr=[])
{
  	// base case, to break the recursion when the array is empty
    if (arr.length === 0) {
    	return;
    }
  	
  	// destructure the array
	const [x, ...y] = arr;
  
  	// Do something to x
  	
  	return recurse(y);
}