import UIKit

// Method to create Body Mass Index

/*

Body Mass Index is a simple calculationusing a person's height and weight. The formula is BMI = kg/m2. where kg is a person's weight in kilograms and m2 is their height in metres squared.

*/

func bodyMassIndex (yourWeight : Float, yourHeight : Float) -> (String) {

let bodyTotals = yourWeight / 2.2    // weight conversion to kg
let heightTotals = yourHeight / 39.37 //height conversion to metres.
let allTotals = heightTotals * heightTotals

let bmiTotals = bodyTotals / allTotals

    if bmiTotals < 18 {
        return "Your BMI is \(bmiTotals)% you are Underweight"   // Change the String what you would like it to say when <18
}
    else if bmiTotals < 24 {
        return "Your BMI is \(bmiTotals)% you are Normal"        // Change the String to what you would like it to say when <24
}
    else {
        return "Your BMI is \(bmiTotals)% your are Overweight"    // Chnge the String to what you would like it to say when over 24%
}

}

bodyMassIndex(yourWeight: 100, yourHeight: 65)

print(bodyMassIndex(yourWeight: 100, yourHeight: 65))