Chapter 2 Question 2.11, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

(Population projection) Rewrite Programming Exercise 1.11 to prompt the user to enter the number of years and displays the population after the number of years. Use the hint in Programming Exercise 1.11 for this program. The population should be cast into an integer.

Solution

import java.util.Scanner;

public class Exercise_02_11 {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in); // Create a Scanner object

        // Prompt the user to the number of years

        System.out.print("Enter the number of years: ");

        int years = input.nextInt();

        // Calculate population projection

        int population = 312032486 + (((31536000 / 7) - (31536000 / 13)

                                + (31536000 / 45)) * years);

        // Display the results

        System.out.println("The population in " + years + " is " + population);

    }

}