Answers for "WAP to find an element using Binary search( Recursive)"

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recursive binary search

import java.util.Scanner;

public class BinarySearching {
    public static void main(String[] argh){
        System.out.println("Enter the size of the Array: ");
        Scanner input = new Scanner(System.in);
        int size = input.nextInt();
        int [] array = new int[size];

       int[] binarySort = enterValues(array,size);

       System.out.println("Which number you want to find? ");
       int numberTofind = input.nextInt();

       int low =0;
       int high = binarySort.length-1;

       if(findNumber(binarySort,numberTofind,low,high) == -1){
           System.out.println("The number you entered dose not exist");
           return;
       }

       System.out.println("the number is at index: "+findNumber(binarySort,numberTofind,low,high));


    }
    public static int[] enterValues(int [] arr,int size){
        System.out.println("Enter Sorted Array: ");
          for(int i=0 ; i<size;++i){
            arr[i] = i;
          }
        return arr;
    }

    public static int findNumber(int [] sortedArray, int findThisNumber,int low , int high ){
            int midle = (low+high)/2;
            if(sortedArray[midle]==findThisNumber)
            { return midle;
            }else if(sortedArray[midle] < findThisNumber)
            {
                return findNumber(sortedArray,findThisNumber,low=midle+1,high);
            }else if(sortedArray[midle] > findThisNumber)
            {
                return findNumber(sortedArray,findThisNumber,low,high=midle-1);
            }
        return -1;
    }

}
Posted by: Guest on July-17-2021

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