Scala program to search an item into the array using interpolation search

Here, we are going to learn how to search an item into the array using interpolation search in Scala programming language?
Submitted by Nidhi, on May 08, 2021 [Last updated : March 10, 2023]

Scala – Interpolation Search Example

Here, we will create an integer array and then we will search an item from the array using interpolation search.

The interpolation search is an improved version of binary search. Here we will use the improved formula to calculate the middle element.

Scala code to search an item into the array using interpolation search

The source code to search an item into the array using interpolation search is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to search an item into array 
// using interpolation search

import scala.util.control.Breaks._    

object Sample {  
    def main(args: Array[String]) {  
        var IntArray = Array(11,12,13,14,15)
        
        var item:Int=0
        var flag:Int=0
        
        var first:Int=0
        var last:Int=0
        var middle:Int=0
        
        print("Enter item: ");
        item=scala.io.StdIn.readInt();
        
        first = 0
        last = 4
        middle = first + (((last - first) / (IntArray(last) - IntArray(first))) * (item - IntArray(first)))
        
        breakable
        {
            flag = -1
            while(first<=last)
            {
                if(IntArray(middle)<item)
                {
                    first=middle+1
                }
                else if(IntArray(middle)==item)
                {
                    flag=middle;
                    break;
                }
                else
                {
                    last = middle - 1
                }
                middle = first + (((last - first) / (IntArray(last) - IntArray(first))) * (item - IntArray(first)))
            }
        }
        
        if(flag>=0)
            printf("Item found at index: %d\n",flag); 
        else
            printf("Item not found\n"); 
    }
} 

Output

Enter item: 13
Item found at index: 2

Explanation

In the above program, we used an object-oriented approach to create the program. We created an object Sample, and we defined main() function. The main() function is the entry point for the program.

In the main() function, we created an integer array IntArray with 5 elements. Then we read an item from the user and search into the array using the interpolation search mechanism. After that, we printed the index of the item on the console screen.

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