Why return does not return 5, but restarts the loop?

Question

C++ / C#

I don't understand why in this code

static int SearchInsert(int[] nums, int target)
        {
            for (int i = 0; i < nums.Length; i++)
            {
                if (nums[i] >= target)
                {
                    return i;
                }
            }
            Console.WriteLine(nums.Length);
            return nums.Length;
        }

, return nums.Length starts the loop again, instead of exiting the method as I thought, can you chew me please?