Question

Write a program to calculate the Body Mass Index (BMI). The formulae to calculate the BMI are

BMI = (weightinPounds x 703) / (heightinInches x heightinInches )
or
BMI = weightinKilograms / (heightinMeters x heightinMeters )

Your program should read the user's weight in pounds and height in inches (or, Kilograms and meters, if you prefer), calculate and display the BMI.

Your program should also display a message indicating how the BMI is evaluated, based on the following BMI values:
Underweight: less that 18.5
Normal: between 18.5 and 24.9
Overweight: between 25 and 29.9
Obese: 30 or greater

Answer 1

import java.util.Scanner;

public class BMI {
   public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       System.out.println("Enter weight in Kilograms: ");
       double weight = sc.nextDouble();
       System.out.println("Enter height in meters: ");
       double height = sc.nextDouble();

       double bmi = weight / (height * height);
       System.out.println("BMI : " + bmi);
       if (bmi < 18.5)
           System.out.println("Under weight");
       else if (bmi >= 18.5 && bmi <= 24.9)
           System.out.println("Normal");
       else if (bmi >= 25 && bmi <= 29.9)
           System.out.println("Overweight");
       else
           System.out.println("Obese");
   }
}

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