Practice›Java Fundamentals›Module 5. Arrays & Lists›5.1 Arrays

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5.1 Arrays — double all

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Task

Fill in doubleAll so that it changes the array: every element becomes twice as large. The method returns nothing.

main prints the array afterwards, so the program prints 2, 4, 6 — the change survives because the array object is shared.

Your solution

public class Main {

    public static void doubleAll(int[] arr) {
        // double every element of the array

    }

    public static void main(String[] args) {
        int[] nums = {1, 2, 3};
        doubleAll(nums);
        for (int i = 0; i < nums.length; i++) {
            System.out.println(nums[i]);
        }
    }
}

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