Week 3: Objects, files and exceptions/9b. Sum of array elements

Write the method

int sum(int[] numbers)

which calculates and returns the array's elements sum.

Example method call:
public static void main(String[] args){
    int[] array = {1,2,3,4};

    int sum = sum(array);
    System.out.println("Sum: " + sum);
}

Program outputs:
Sum: 10




=============



import java.util.Random;
import java.util.Arrays;

public class Test {
    public static void main(String[] args) {
        final Random r = new Random();
        
        
        for (int test = 1; test <= 3; test++) {
            System.out.println("Test " + test);
            
            int length = r.nextInt(5) + 5;
            int[] array = new int[length];
            for (int i = 0; i < length; i++) {
                array[i] = r.nextInt(10) + 1;
            }
            
            System.out.println("Array: " + Arrays.toString(array));
            System.out.println("Sum: " + sum(array));
            System.out.println("");
        }
    }




    public static int sum(int[] numbers){
        int sum = 0;
        for (int num : numbers) {
            sum += num;
        }
        return sum;
    }

    
}



Test 1
Array: [6, 2, 3, 10, 3, 9, 5, 1]
Sum: 39

Test 2
Array: [1, 6, 10, 8, 10, 8, 3, 1]
Sum: 47

Test 3
Array: [9, 7, 6, 4, 6, 8]
Sum: 40