Solution for the assignment (search in array) of 10 to 12 batch given on 3rd, August, 2017

This solution is implemented and provided by 

=>  ITI Dixit 

=>  Computer Science 

=>  Banasthali University (Jaipur)

in this class we take size and values of single dimension array from keyboard, then we perform a search operation on the basis of value and index  

# save this class inside a file Find.java #

import java.util.*;

public class Find 

{

    public static void main(String[] args)

    {       

       Scanner sc=new Scanner(System.in);

       System.out.println("ENTER SIZE OF ARRAY : ");

       //taking size of array as an input from the user

       int size=sc.nextInt(); 

       //array declaration

       int[] a=new int[size];

       //taking array elements as an input from the user

       System.out.println("ENTER ARRAY ELEMENTS : ");

       for(int i=0;i<size;i++) {

          a[i]=sc.nextInt();

        }

       //display of array elements using foreach loop

       System.out.println("ARRAY ELEMENTS ARE : ");

       for(int i : a)

           System.out.println(i);

       System.out.println("-------------------------------------------------");

       //taking user's choice according to the menu

       System.out.println("ENTER CHOICE : \n 1. FIND BY VALUE \n 2. FIND BY INDEX");

       int ch=sc.nextInt();   

       

       switch(ch)

       {

        case 1:

        

        //taking a number as an input from the user

        System.out.println("PLEASE ENTER  A NUMBER : ");

        int num=sc.nextInt();

        

        //variable for storing first index of the number

        int index = 0;

        for(int i=0;i<size;i++)

        {

            if(a[i]==num)            

           {

               index=i;

               break;

           }

        }

        System.out.println("FIRST INDEX OF "+num+" = "+index);

               

               break;

           case 2:

        

             //taking an index as an input from the user

               System.out.println("PLEASE ENTER  AN INDEX : ");

        int ind=sc.nextInt();

      

  //checking if the index is validate or not

        if(ind<0 || ind>size-1) {

            System.out.println("INVALID INDEX");

        }

           else

            //display of element at the given index if it is valid

        System.out.println("ELEMENT AT INDEX "+ind+" = "+a[ind]);

               break;

           default:

               System.out.println("INVALID CHOICE");

       }

    }

}