using System;

​

public class Program

{

    public static void Main()

    {

        string result = "";

        double bmi = 0;

        double weight = 0;

        double height = 0; //lines 7-10 set all variables

        Console.WriteLine("[1] for Metric, [2] for Imperial: "); //asks for the users preferable unit 

        int unit = Convert.ToInt32(Console.ReadLine()); //sets the units to either metric or imperial

        if (unit == 1) //if the user chooses metric, lines 14-21 are used

        {

            Console.WriteLine("You chose Metric:"); //the console clarifies what the user chose

            Console.WriteLine("Enter your weight (kg): "); //weight in kg is asked

            weight = Convert.ToDouble(Console.ReadLine()); //weight is set to the users response

            Console.WriteLine("Enter your height (m): "); //height in m is asked

            height = Convert.ToDouble(Console.ReadLine()); //height is set to users response

            bmi = weight / (height * height); //metric bmi formula is used, and variable "bmi" is set to the answer

        }

        else if (unit == 2) //if the user chooses imperial, lines 23-20 are used

        {

            Console.WriteLine("You chose Imperial:");

            Console.WriteLine("Enter your weight (lbs): "); //weight in lbs is asked

            weight = Convert.ToDouble(Console.ReadLine()); //weight is set to the users response

            Console.WriteLine("Enter your height (in): "); //height in in is asked

            height = Convert.ToDouble(Console.ReadLine()); //height is set to users response

            bmi = (weight * 703) / (height * height); //imperial bmi formula is used, and variable "bmi" is set to the answer

        }

        else //if the user doesnt choose metric (1) or imperial (2), lines 32-34 are used

        {

            Console.WriteLine("Invalid value, please enter [1] for Metric, or [2] for Imperial."); //if the user doesn't enter either 1 or 2, console reminds them to choose either 1 or 2

        }

​

        if (bmi > 0 && bmi < 15) //if bmi is less than 15

        {

            result = "starving"; //sets "result" value to "starving"

        }

        else if (bmi >= 15 && bmi < 18.5) // if bmi is from 15 to less than 18.5

        {

            result = "underweight"; //sets "result" value to "underweight"

        }

        else if (bmi >= 18.5 && bmi <= 25) // if bmi is from 18.5 to 25

        {

            result = "ideal"; //sets "result" value to "ideal"

        }

        else if (bmi > 25 && bmi <= 30) // if bmi is from over 25 to 30

        {

            result = "overweight"; //sets "result" value to "overweight"

        }

        else if (bmi > 30 && bmi <= 40) // if bmi is from over 30 to 40

        {

            result = "obese"; //sets "result" value to "obese"

        }

        else if (bmi >40) // if bmi is greater than 40

        {

            result = "morbidly obese"; //sets "result" value to "morbidly obese"

        }

        if (unit == 1 || unit == 2) //if metric or imperial isn't chosen, the final sentence will not appear because the weight and height cannot be given

            {Console.WriteLine("Your BMI is " + bmi + ", and according to the BMI chart you are " + result + ".");} //Console gives results using the bmi variable and the result variable

    }

}