One box outside the loop

The register holds six counts of plates. The cook wants one number, not six.

The rule

Add the six counts to get one total, 166. A loop repeats the same lines once for each count.

One box sits outside the loop. One line inside it adds each item on. That pair turns a whole list into one total.

• let total = 0; — the box, made before the loop.
• total = total + count; — the line, inside the loop.
• return total; — after the loop, the box holds the total.

A turn is one pass of the loop. The box must exist before the first turn. Then every turn adds onto something already there.

An empty register still works. The loop has no turns, so the box stays at 0.