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Hey,

Everything you have done is correct and should work the way the tasks requests for you to do. The only issue is the line:

sum = sum + counter

You're correctly calculating the sum value within the loop but using this line afterwards will actually increase the sum incorrectly and not actually using the numbers in the numbers list.

Hope this helps, Daniel

Well, you're already pulling the values from the numbers array with this line:

sum += numbers[counter]

The counter variable acts as index value for the list. So, by putting the counter value inside brackets after the numbers variable list, it will take out the value at the "counter" position. For example, If counter was = 3 then numbers[counter] would = 16. Also, by looping, the counter value is increasing each time so each value will be different as you're moving along the list.

This is how it works, step by step.

• 1) Firstly, you set up all the variables which in this case is numbers, sum & counter
• 2) The challenge wants you to calculate the sum of each value in the numbers list so the easiest way to this is with a loop. Therefore, you create a loop that can only go up to the amount of elements in the numbers list
• 3) Now, you want to calculate the sum of all values. To do this, you need to extract the current index that the loop is currently at. You do this with the counter variable and do as I explained earlier. To make sure you remember this value, you add it to the current value in the sum variable.
• 4) To keep the loop reaching and end, you need to make sure the counter value increases so you add 1 to it.
• 5) The process repeats until the loop has reached its end.

Here is how the sum value will look from start to finish: 0->2->10->11->27->31->34->43

And heres how the counter value will look from start to finish: 0->1->2->3->4->5->6