CodeAcademy - Hello New York, Sec 1/1, Ex 4/5

gistfile1.js

/*
4. After Dark
The cost of a Taxi ride varies by time of day (we pay 
drivers extra to work the night shifts). A flat surcharge 
of $0.50 is added to cost for any trip starting at 8pm 
and continues until we hit 6am.

Expand your taxiFare function to accept a second parameter 
called hourOfDay which represents the time of pickup. Add 
a night surcharge of $0.50 during the appropriate hours, 
specified as a number between 0-23.

Steps that may help:

a) Add the second parameter into the taxiFare function.

b) Starting on line 11, add an if / else statement. We want 
the nightSurcharge to be added for the time starting 
(and including) 8pm, and ending at (but NOT including) 6am!

How do we represent or? We use ||
*/

// add a parameter called hourOfDay to the function
var taxiFare = function (milesTraveled, hourOfDay) {
  var baseFare = 2.50;
  var costPerMile = 2.00;
  var nightSurcharge = 0.50; // 8pm to 6am, every night

  var cost = baseFare + (costPerMile * milesTraveled);
  
  // add the nightSurcharge to the cost starting at 
  // 8pm (20) or if it is before 6am (6)
 if (hourOfDay  < 6 || hourOfDay >= 20) {
    return cost + nightSurcharge;
 }
 else
 return cost;
};