//BMI_Calculator.cs
//Console BMI calculator

using System;
namespace BMI_Calculator
{
	class  program //defines class as program (Class program start)
		{//Main Method Start
			public static void Main ( string[] args )
				{
				decimal Height; //Set's the variables for Height and Weight input
				decimal Weight; //and the output variable for BMI using decimal
				decimal BMI;	//because needed real value for input and output i.e: 1.91m.
				Console.WriteLine ("Please enter your height in Metres ex. 1.55 (155cm)"); 	//Writes on the screen asking for user to input their height in metres.
				Height = Convert.ToDecimal (Console.ReadLine ());							//Allows user to input data and converts to decimal and stores in the Height variable for later use.
				Console.WriteLine ("Please enter your weight in Kilograms ex. 85 (85kg)");	//Writes on the screen asking for user to input their weight in kilograms
				Weight = Convert.ToDecimal (Console.ReadLine ());							//Allows user to input data and converts to decimal and stores in the Weight variable for later use.


				BMI=Weight/Height/Height;													//Internal calculation to work out the BMI variable this is done by
																							//retrieving the Weight variable and dividing it by the Height Variable twice

				Console.WriteLine("Your Body Mass Index is: {0:F3}", BMI);									//Writes on the screen the result of the BMI calculation limited to 3 decimal places to be more readable
				if (BMI <20)																				//the if statement is used to give to a differnt output depending on the result of BMI variable.
				Console.WriteLine("This result suggests you are underweight, which can affect health.");	//if the value of BMI is less than 19 this will be displayed on the screen
				if (BMI >25 && BMI <30)																		//the "if (BMI >25 && BMI <30)" line checks if the BMI variable output is inbetween the value of 25 and 30 and gives the correct output BMI variable
				Console.WriteLine("This result suggests you are overweight, which increases the risk of becoming ill with problems such as high blood pressure, heart disease and cancer.");
				if (BMI >30)
				Console.WriteLine("This result suggests you are obese, which increases the risk of becoming ill with problems such as high blood pressure, heart disease and cancer.");
				if (BMI >20 && BMI <25)
				Console.WriteLine("This result suggests you are a healthy weight for your height. Maintaining a healthy weight decreases the risk of a range of serious health problems.");
				} // End method main.
		}//Ends class program.
}