import java.util.Scanner;

import java.util.Arrays;

public class FirstAndLast

$\{$

public static void main$($String$[]$ args$)$

$\{$

Scanner in $=$ new Scanner$($System$.$in$)$;

final int LENGTH $=100$;

double$[]$ prices $=$ new double$[$LENGTH$]$;

System.out.println$("$Enter prices, Q to finish:"$)$;

int numberOfPrices $=0$;

while $($in$.$hasNextDouble$())$

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double price $=$ in$.$nextDouble$()$;

if $($numberOfPrices $<$ LENGTH$)$

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prices$[$numberOfPrices$]=$ price;

numberOfPrices$++$;

$\}$

$\}$

double sum $=/*$ Your code goes here $*/$;

System.out.printf$("$Sum of first and last: $\%\mathrm{.}2$f$\%$n$",$ sum$)$;

$\}$

$\}$