Contents.swift

/*:
 ## App Exercise - Fitness Calculations
 
 >These exercises reinforce Swift concepts in the context of a fitness tracking app.
 
 Your fitness tracker keeps track of users' heart rate, but you might also want to display their average heart rate over the last hour. Create three constants, `heartRate1`, `heartRate2`, and `heartRate3`. Give each constant a different value between 60 and 100. Create a constant `addedHR` equal to the sum of all three heart rates. Now create a constant called `averageHR` that equals `addedHR` divided by 3 to get the average. Print the result.
 */
let heartRate1 = 66
let heartRate2 = 81
let heartRate3 = 92

let addedHR = heartRate1 + heartRate2 + heartRate3
let averageHR = addedHR / 3

print(averageHR)
/*:
 Now create three more constants, `heartRate1D`, `heartRate2D`, and `heartRate3D`, equal to the same values as `heartRate1`, `heartRate2`, and `heartRate3`. These new constants should be of type `Double`. Create a constant `addedHRD` equal to the sum of all three heart rates. Create a constant called `averageHRD` that equals the `addedHRD` divided by 3 to get the average of your new heart rate constants. Print the result. Does this differ from your previous average? Why or why not?
 */
let heartRate1D = Double(heartRate1)
let heartRate2D = Double(heartRate2)
let heartRate3D = Double(heartRate3)

let addedHRD = heartRate1D + heartRate2D + heartRate3D
let averageHRD = addedHRD / 3

print(averageHRD) // More precise
/*:
 Imagine that partway through the day a user has taken 3,467 steps out of the 10,000 step goal. Create constants `steps` and `goal`. Both will need to be of type `Double` so that you can perform accurate calculations. `steps` should be assigned the value 3,467, and `goal` should be assigned 10,000. Create a constant `percentOfGoal` that equals an expression that evaluates to the percent of the goal that has been achieved so far.
 */
let steps: Double = 3_467
let goal: Double = 10_000

let percentOfGoal = (steps / goal) * 100
print(percentOfGoal)
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