Basic BMI Calculator : Functions, Conditional Statement.

In todays lecture I covered the basics of functions, conditional statements, comments and printing stuff.

Here is the code I wrote to calculate the BMI of a person.

import UIKit


func calculateBmi(weight: Double, height: Double) -> String {
    
    var finalBmi = weight / (height * height)
    
    let shortBmi = String(format: "%.2f", finalBmi)
    
    if finalBmi > 25 {
        return "Your BMI is \(shortBmi) , you are overweight."
    } else if finalBmi > 18.5 && finalBmi <= 25 {
        return "Your BMI is \(shortBmi) , you have a normal weight."
        
    } else {
        
        return "Your BMI is \(shortBmi) , you are underweight."
    }
    
}


print(calculateBmi(weight: 85, height: 1.8))

The formulae used for calculating the BMI is -: weight(kg) / height(in meters) * height(in meters)

What the code basically does:

Creates a function which takes weight and height as input. (used double instead of Int, to facilitate use of decimals)
finalBmi contains the method of calculating BMI
shortBmi basically restricts the output to 2 decimal places
If BMI is greater than 25 then return a certain statement to the user, if not then return another statement.
Finally used print to log the output to the console.

Basic BMI Calculator : Functions, Conditional Statement.

Prateek Katyal