1. The transformation and generation systems can typically handle imperfectly nested loops . 2. The evaluation procedure can be thought of as a nested loop . 3. Merge joins were added, previous all joins were nested loop joins. 4. Instead of a nested loop , they mess around with the list pointer. 5. Is some BASIC with three nested loops . 6. In a traditional nested loop join, S will be scanned once for every tuple of R. 7. Do you want nested loops ? talk ) 03 : 44, 7 September 2012 ( UTC) 8. Imperfectly nested loops and some transformations ( such as tiling ) do not fit easily into this framework. 9. Some languages support breaking out of nested loops ; in theory circles, these are called multi-level breaks. 10. The ENIAC was programmed using subroutines, nested loops , and indirect addressing for both data locations and jump destinations.