Define a class to accept values into an array of double data type of size 20. Accept a double value from user and search in the array using linear search method. If value is found display message "Found" with its position where it is present in the array. Otherwise display message "not found".

Java Programming Language (Article) (Program)

81

---

Given Input:

Enter array elements:
1.5 2.3 3.9 4.1 5.6 6.7 7.8 8.0 9.2 10.5 11.3 12.6 13.7 14.8 15.9 16.4 17.5 18.3 19.0 20.1
Enter the number to search: 15.9

Expected Output:

15.9 found at index 14

Program:

import java.util.Scanner;

public class RansariLinearSearch {

    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);  // Create Scanner object for input
        
        double arr[] = new double[20];  // Declare an array of double data type with size 20
        int l = arr.length;  // Get the length of the array (which is 20)
        int i = 0;
        
        // Accept values for the array from the user
        System.out.println("Enter array elements: ");
        for (i = 0; i < l; i++) {
            arr[i] = in.nextDouble();  // Accept each double value from the user and store it in the array
        }
        
        // Ask user for the number to search in the array
        System.out.print("Enter the number to search: ");
        double n = in.nextDouble();  // Accept the number to search for
        
        // Linear search algorithm
        for (i = 0; i < l; i++) {
            if (arr[i] == n) {  // If the current element is equal to the number being searched
                break;  // Exit the loop when the value is found
            }
        }
        
        // Check if the number was found or not
        if (i == l) {
            System.out.println("Not found");  // If the loop goes through all elements and doesn't find the number
        } else {
            System.out.println(n + " found at index " + i);  // If the number was found, display the index
        }

        in.close();  // Close the Scanner object
    }
}

Output:

15.9 found at index 14

If the search value is not found in the array:

Not found


Output:
mathematica
Copy
Edit

Explanation:

---

---