Class examples #3

Ex1.java

public class Ex1 {
    public static void main(String[] args) {
        int[] arr = new int[3];
        arr[0] = 1;
        arr[1] = 423;
        arr[2] = -32;
        
        for(int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }
    }
}

Ex2.java

public class Ex2 {
    public static void main(String[] args) {
        System.out.println(sum(3, 6)); // Виклик функції (function call/invocation)
    }
    
    static int sum(int a, int b) { // Оголошення функції (function declaration)
        int s = a + b;
        return s;
    }
}

Ex3.java

public class Ex3 {
    public static void main(String[] args) {
        int[] arr = generateRandomArray(10, 0, 10);
        printArray(arr);

    }
    
    static void printArray(int[] arr) {
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }
    }

    static int[] generateRandomArray(int length, int start, int end) {
        int[] arr = new int[length];
        for (int i = 0; i < length; i++) {
            arr[i] = random(start, end);
        }
        return arr;
    }

    static int random(int start, int end) {
        int range = end - start;
        int shift = start;

        int random = (int) (Math.random() * range) + shift;
        return random;
    }
}