error (Unreachable Code) in calling variable

Question

I'm trying to make a program that lets the user to input 10 integers, and then calculate the average of that integers. I got Unreachable code error in System.out.println("average : " + average); line.

I already try to make a new class and call the method to my main method but it seems not a simple way to do that (and also there's still some error that make me more confuse). So I guess I can make a simple program like this. But i'm stuck figuring out what's wrong with the code. Here's the code.

package nomer15;

import java.util.Scanner;

public class averag {

    public static void main(String[] args) {

        System.out.println("Enter 10 integers : ");

        double average;
        int sum = 0;
        Scanner sc = new Scanner(System.in);
        int numbers[] = new int[10];
        for(int i = 0; 1 < 10; i++){
            numbers[i] = sc.nextInt();

            sum = sum + numbers[i];

            average = sum/10;

        }

        System.out.println("average : " + average);  // (Unreachable code error)

    }

}

Can you figure out what I did wrong? Thank you.

Answer 1

In addition to your loop test being incorrect (1 is always less than 10), you should calculate the average after the loop. And you shouldn't use integer math. Finally, I would prefer numbers.length to the magic 10. Something like

public static void main(String[] args) {
    int[] numbers = new int[10];
    System.out.printf("Enter %d integers : ", numbers.length);
    int sum = 0;
    Scanner sc = new Scanner(System.in);
    for (int i = 0; i < numbers.length; i++) {
        sum += (numbers[i] = sc.nextInt());
    }
    double average = sum / (double) numbers.length;
    System.out.println("average : " + average);
}