package arr;

import java.math.BigInteger;
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;

public class arr {
	public static void printFistAndLastElementsInArray(int[] arr) {
		System.out.println("first element is " + arr[0]);
		System.out.println("last element is " + arr[arr.length - 1]);
	}

	public static void sumArray(int[] array) {
		long sum = 0;
		for(int i = 0; i < array.length; i++) {
			sum += array[i];
		}
		System.out.println("Sum of elements is " + sum);
	}

	public static void bigestNumber(int[] array) {
		long max = Integer.MIN_VALUE;
		for(int i = 0; i < array.length; i++) {
			if(array[i] > max) {
				max = array[i];
			}
		}
		System.out.println("Bigest number in array is " + max);
	}

	public static void printArray(int[] array) {
		for(int i = 0; i < array.length; i++) {
			System.out.println("index " + i + " value " + array[i]);
		}
	}

	public static void main(String[] args) {
		try {
			 //fill on array
			 Scanner scan = new Scanner(System.in);

			 System.out.println("Enter length on array");
			 int elementsInArray = scan.nextInt();

			 int[] array = new int[elementsInArray];
			 for(int i = 0; i < array.length; i++) {
				 array[i] = scan.nextInt();
			 }

			 printFistAndLastElementsInArray(array);
	     	 printArray(array);
			 sumArray(array);
			 bigestNumber(array);

		}catch(Exception e) {
			System.out.println("Error ! ");
		}
	}
}