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  • 1. Fasten your seat belts
  • 2. Long-distance flight
  • 3. Going the second circle
  • 4. Helper function
  • 5. Function, I’m calling you!
  • 6. I have a parameter for you
  • 7. Order of parameters
  • 8. Return from function
  • 9. Summary of “Functions”. Part 1
  • 10. Seventh program: “From salary to salary”
  • 11. Business trip
  • 12. Write, simplify
  • 13. Get rid of unnecessary
  • 14. Make me beautiful
  • 15. Just add percentage
  • 16. Call me quietly by name
  • 17. I see the target
  • 18. How many flights?
  • 19. Let’s clean up a little
  • 20. Who is faster?
  • 21. Saving up for a trip around the world
  • 22. Summary of “Functions”. Part 2
  • 23. Eighth program: “Money makes money”
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  • Theory
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How many flights?

Now we have a function that counts how many flights we have to take to the same destination to accumulate the necessary number of miles.

To find out how Muffin can get to Tokyo quicker, we need to compare the number of flights to each destination. To do this, we need to call the calculateFlights function twice, for flights to Valencia and Lisbon, with the same value of the third argument (15000 miles to Tokyo).

Now, in order to understand what is more profitable for us, let’s find out how many business trips to Lisbon Muffin needs to go on before he can finally set out on vacation to Tokyo of his dreams. The distance to the capital of Portugal is 3617 km.

Comments

  • script.js
JavaScript
var calculateMiles = function (distance, isBusinessClass) { var percent = 0.18; if (isBusinessClass) { percent += 0.04; } if (distance > 3500) { percent += 0.15; } return distance * percent; }; var calculateFlights = function (distance, isBusinessClass, milesTarget) { var miles = calculateMiles(distance, isBusinessClass); console.log('Miles for the flight: ' + miles); var flights = Math.ceil(milesTarget / miles); console.log('Number of flights: ' + flights); }; calculateFlights(3118, true, 15000);

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Console

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Result

Goalscompleted
  1. Inside the calculateFlights function, delete log of values in the console.
  2. Return the number of flights using return from the calculateFlights function.
  3. Replace the calculateFlights(3118, true, 15000) function call with logging the following message in the console 'Required number of flights in business class to Valencia: ' + calculateFlights(3118, true, 15000).
  4. Add one more message below 'Required number of economy flights to Lisbon: ' + calculateFlights(3617, false, 15000).

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