An algorithm designed to monitor a cargo weight limit is shown below:

1  total_weight ← 0
2  item_count ← 0
3  limit_reached ← False
4  IF total_weight < 50 THEN
5      WHILE limit_reached = False AND item_count < 10
6          item_weight ← GET_ITEM_WEIGHT()
7          IF total_weight + item_weight > 50 THEN
8              limit_reached ← True
9          ELSE
10             total_weight ← total_weight + item_weight
11             item_count ← item_count + 1
12         ENDIF
13     ENDWHILE
14 ENDIF

Where is iteration first used in this algorithm?