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Economy printing
Loops18/28
Back to the list of tasks
  • 1. New project: driver development
  • 2. Managing the number of copies
  • 3. Learning the for loop
  • 4. Correcting the loop
  • 5. Printing the pages in reverse order
  • 6. Printing only odd pages
  • 7. Printing only even pages
  • 8. Printing driver: copy mode
  • 9. Printing driver: all pages
  • 10. Printing driver: pages in reverse order
  • 11. Print driver: even and odd pages
  • 12. Print driver: switching evens and odds
  • 13. Accumulation in the loop
  • 14. Checks in loops
  • 15. Searching for an even number
  • 16. How much does printing cost?
  • 17. Economy printing
  • 18. Saving ink
  • 19. Summary of “Loops”. Part 1
  • 20. Third program: “Protein shake!”
  • 21. It’s been a “while”
  • 22. The while loop, summation
  • 23. Another project: a dart machine
  • 24. Dart machine: accumulating misses
  • 25. Dart machine: defeat
  • 26. Dart machine: final scoreboard
  • 27. Summary of “Loops”. Part 2
  • 28. Fourth program: “Mad Dryer”
Summary of “Loops”. Part 1
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  • Theory
  • Theory
  • Comments

Saving ink

Toner count is almost ready. For now the code in the loop body looks like this:

if (economyMode && page > 3) {
  consumptionTotal += consumptionPerPage * 0.5;
}

consumptionTotal += consumptionPerPage;

It turns out that if the economy mode is on and the page number is greater than three, we use half the ink compared with the standard mode per one page. And then, it does not matter if the condition works or not, we still increase the consumption rate consumptionTotal += consumptionPerPage;. It turns out that we are not saving, but rather wasting resources. Add else to the condition and transfer the string consumptionTotal += consumptionPerPage; there. Then turn on toner save mode and check that everything is working correctly.

Comments

  • script.js
JavaScript
var totalPages = 6; // Total number of pages var consumptionTotal = 0; // Total toner consumption var consumptionPerPage = 70; // Toner consumption per page var economyMode = false; for (var page = 1; page <= totalPages; page++) { muffin.print(page); if (economyMode && page > 3) { consumptionTotal += consumptionPerPage * 0.5; } consumptionTotal += consumptionPerPage; console.log(consumptionTotal); }

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Result

Goalscompleted
  1. Add else and move consumptionTotal += consumptionPerPage; there.
  2. Change the economyMode value to true.

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