import java.util.*;
class CheckArray 
{
    public static void main(String[] args) 
    {
        int array[]={1,2,3,4,5};
        Scanner input=new Scanner(System.in);
        System.out.print("Enter Number: ");
        int num=input.nextInt();
        boolean check=false;
        for(int i=0;i<array.length;i++){
            if(array[i]==num){
                check=true;
            }
        }
        if(check){
        System.out.println("Given numbers is in the array");
        }
        else{
        System.out.println("Given numbers is not in the array");
        }

    }
}

Many many thanks... I was badly stuck in this. But can you do me 1 more favour.. In the end How to find the total price of the books that has been purchased