A half-life is the amount of time it takes for a substance or entity to fall to half its original value. Caffeine has a half-life of about 6 hours in humans. Given caffeine amount (in mg) as input, output the caffeine level after 6, 12, and 24 hours. Output each floating-point value with two digits after the decimal point, which can be achieved as follows: System.out.printf("After 6 hours: %.2f mg\n", yourValue); Ex: If the input is: 100

EBK JAVA PROGRAMMING
9th Edition
ISBN:9781337671385
Author:FARRELL
Publisher:FARRELL
Chapter2: Using Data
Section: Chapter Questions
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In JAVA

ASSIGNMENT DESCRIPTION:

A half-life is the amount of time it takes for a substance or entity to fall to half its original value. Caffeine has a half-life of about 6 hours in humans. Given caffeine amount (in mg) as input, output the caffeine level after 6, 12, and 24 hours.

Output each floating-point value with two digits after the decimal point, which can be achieved as follows:
System.out.printf("After 6 hours: %.2f mg\n", yourValue);

Ex: If the input is:

100

the output is:

After 6 hours: 50.00 mg After 12 hours: 25.00 mg After 24 hours: 6.25 mg

Note: A cup of coffee has about 100 mg. A soda has about 40 mg. An "energy" drink (a misnomer) has between 100 mg and 200 mg.

THE CODE I HAVE SO FAR:

import java.util.Scanner;

public class LabProgram {

public static void main(String[] args) {

Scanner scnr = new Scanner(System.in);

double caffeineMg; // "double" supports floating-point like 75.5, versus int for integers like 75.

 

caffeineMg = scnr.nextDouble();

System.out.printf("After 6 hours: %.2f mg\n", yourValue);

}

}

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