import java.util.Scanner;

public class FirstAndLast { public static void main(String[] args) { final int LENGTH = 100; double[] prices = new double[LENGTH];

int numberOfPrices = 0; Scanner in = new Scanner(System.in); while (in.hasNextDouble()) { if (numberOfPrices < prices.length) { prices[numberOfPrices] = in.nextDouble(); numberOfPrices++; } }

double sum = . . .; System.out.printf("Sum of first and last: %.2f ", sum); } }