Project.1

import java.util.Scanner;
import java.util.Arrays;
public class BigProject1 {

//method to print the array delimited by spaces
	public static int[] print(int[] arr) {
		for(int i=0; i<arr.length; i++) {
			System.out.print(arr[i]+ " ");
		}
		return arr;
	}
//method to sort the array
	public static int[] sorted(int[] arr2) {
		for(int o=0; o<arr2.length; o++) {
			Arrays.sort(arr2);
		}
		return arr2;
	}
//method to count the number of different elements in the array
	public static int different(int[] arr3) {
		if(arr3.length==0) {
			return 0;
		}
		int counter=1;
		for(int x=1; x<arr3.length; x++) {
			if(arr3[x]!=arr3[x-1]) {
				counter++;
			}
		}
		return counter;
	}
	/*public static int[] pals(int[] arr4){
		int count2=0;
		for(int i=0; i<arr4.length; i++) {
			int n= arr4[i];
			int rev=0;
			int tmp=0;
			while(n>0) {
				tmp=n%10;
				n=n/10;
				rev=rev*10+tmp;
			}

			if(arr4[i]==rev) {
				count2++;
			}
			else {
				System.out.print("");
			}
		}
		return arr4;
	}*/

	public static void main(String[] args) {
/*prompts user for the length of their array, initializes an array with that
 * length, loops through all the elements the user inputs, and stores every
 * element in the array, then calling the print method to print the array
 */
		Scanner scan= new Scanner(System.in);
		System.out.print("Enter the length of the array: ");
			int len= scan.nextInt();
		int[] arr= new int[len];
			for(int i=0; i<arr.length; i++) {
				arr[i]=scan.nextInt();
			}

		print(arr);
//printing the length of the array again for the first objective
		System.out.println("\nNumber of elements:"+arr.length);
/*initializing a variable at position 0 of the array, loops through all the
 * elements of the array, finds the largest element and prints it
 */
		int max1=arr[0];
			for (int j=0; j<len; j++) {
				if (max1 < arr[j]) {
					max1 = arr[j];
				}
			}
		System.out.println("Largest number: " +max1);
//calling the print and sort methods to print the sorted array
		print(sorted(arr));
/*Initializing two variables,looping through all elements of the array using
 *if statements to check which value is the smallest and which is the
 *second smallest and printing the second smallest element
 */
		int min=Integer.MAX_VALUE;
		int min2=Integer.MAX_VALUE;
			for(int k=0; k<arr.length; k++) {
				if(arr[k]==min) {
					min2=min;
				}
				if(arr[k]<min) {
					min2=min;
					min=arr[k];
				}
				else if(arr[k]<min2) {
					min2=arr[k];
				}
			}
		//System.out.print("\nSmallest number:"+min);
		System.out.print("\nSecond smallest number: "+min2);
//counting all even numbers and printing that number
			int count=0;
			for(int l=0; l<arr.length; l++) {
				if(arr[l]%2==0) {
					count++;
				}
			}
		System.out.println("\nNumber of evens: "+count);
//counting all odd numbers and printing that number
		int count1=0;
			for(int m=0; m<arr.length; m++) {
				if(arr[m]%2!=0) {
					count1++;
				}
			}
		System.out.println("Number of odds: "+count1);
/*initializing a variable with 0, looping through the elements in the array
 * setting the variable to be itself plus the element in each position of
 * array, printing the sum of all elements
 */
		int sum=0;
			for(int q=0; q<arr.length; q++) {
				sum=sum+arr[q];
			}
		System.out.println("Sum of all numbers: "+sum);

/*reversing the numbers in the array and comparing the original number
 * with the reversed one, printing the number of numbers with equal
 * reversed and original forms
 */
		int[] palarr=new int[len];
		int index=0;
		int count2=0;
		for(int i=0; i<arr.length; i++) {
			int n= arr[i];
			int rev=0;
			int tmp=0;
		while(n>0) {
			tmp=n%10;
			n=n/10;
			rev=rev*10+tmp;
		}
		if(arr[i]==rev) {
			count2++;
			arr[i]=palarr[index];
			index++;
		}
		else {
			System.out.print("");
		}
	}
print(palarr);
		System.out.println("\nNumber of palindromic numbers: "+count2);
//calling the method that finds the number of different elements and printing
		System.out.println("Number of different elements: "+different(arr));

		/*int count3=1;
		for(int x=1; x<arr.length; x++) {
			if(arr[x]==arr[x-1]){
				count3++;
				//System.out.print("Frequency of: "+arr[x]+"is"+count3/arr.length*100+"%");
				System.out.println(count3);
			}
		}*/

//printing average of all elements by taking the sum and dividing by the length
		System.out.println("Average of all numbers: "+sum/len);


	}
}