Finders Keepers Return 1 or more elements of array?

JavaScript
1

Hello,
Do you have any idea for how my code can return 8 and not 10? My loop finish at 10, how can I have 8?
Thnx a lot for help.

function findElement(arr, func) {
  let num = 0;

      for(let i=0; i < arr.length; i++)  {
            if(func) {
            num = arr[i];    
            }else{return undefined}
      }
  return num;
}

findElement([1, 2, 3, 4], num => num % 2 === 0);

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Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-algorithm-scripting/finders-keepers