Question

IN JAVA CSCI 1301: 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

Answer 1

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();

        caffeineMg = caffeineMg/2;
        System.out.printf("After 6 hours: %.2f mg\n", caffeineMg);
        System.out.printf("After 12 hours: %.2f mg\n", caffeineMg/2);
        System.out.printf("After 24 hours: %.2f mg\n", caffeineMg/8);

    }
}