Question

In Java

Body mass index is a measure of whether someone's weight is appropriate for their height. A body- mass-index value between 19 and 25 is considered to be in the normal range. Here's the formula for calculating body mass index: BMI- (704 x weight in pounds) / height in inches*2 a) Implement a program that prompts the user for height and weight values and displays the associated body mass index. Perform input validation by making sure that the user enters positive decimal numbers for height and weight. See the sample session for details. In particular, note the format for the echo-printed height and weight values and for the generated body-mass-index value For this program, there's no need for multiple classes or even multiple methods. Just put all your code in a main method and put the mainmethod in a BodyMassIndex class Sample session: Enter height in inches: hi Invalid inces value. Must be a decimal number Re-enter height in inches: 0 Invalid inches value. Must be positive. Re-enter height in inches 69.25 Enter weight in pounds dog Invalid pounds value. Must be a decimal number Re-enter weight in pounds:-3 Invalid pounds value. Must be positive. Re-enter weight in pounds 150.5 height 69.25" weight 150.5 pounds body mass index22.1

Answer 1

Given: Write a program to take height and weight with some validation that it should accept only decimal non zero value and calculate body mass by using given formula.

Code:

import java.util.Scanner;

public class Main
{
   public static void main(String[] args) {
       float height=0, weight=0;
       float result;
      
       Scanner input=new Scanner(System.in);
      
       System.out.println("Enter height in inches: ");
       if(input.hasNextFloat()) {
height = input.nextFloat();
if(height == 0 || height<0)
System.out.println("Invalid inches value. Must be positive.");
}
else
{
System.out.println("Invalid inches value. Must be a decimal number");
}
  
System.out.println("Enter weight in pounds: ");
       if(input.hasNextFloat()) {
weight = input.nextFloat();
if(weight == 0 || weight<0)
System.out.println("Invalid inches value. Must be positive.");
}
else
{
System.out.println("Invalid inches value. Must be a decimal number");
}
  
result = (704 * weight)/(height * height);
System.out.println("height = " + height + "inches");
System.out.println("weight = " + weight + "pounds");
System.out.println("body mass index = " + result);
   }
}

Output:

Enter height in inches: 69.25 Enter weight in pounds: 150.5 eight69.25inches weight = 150 .5pounds body mass index 22.093758 . . Program finished with exit code 0 Press ENTER to exit console.

Please let me know in the comment if you need more help in this.