Interpolation

package Interpolation;

import java.util.Arrays;
import java.util.Scanner;

public class Tesy {

    public static void main(String[] args) {
        Tesy.rty();
    }

    public static void rty() {
        double product, sum = 0;

        Scanner sc = new Scanner(System.in);
        System.out.print("Enter the Number of Terms: ");
        int n = sc.nextInt();

        double[] x = new double[n];
        double[] y = new double[n];

        System.out.println("Enter all the x, y terms: ");
        for (int i = 0; i < n; i++) {
            x[i] = sc.nextDouble();
            y[i] = sc.nextDouble();
        }

        System.out.println("x = {" + Arrays.toString(x) + "}");
        System.out.println("y = {" + Arrays.toString(y) + "}");

        System.out.println("Do you  want to interpolate for x or y."
                + " If x enter 1, If y enter 2");
        int cc = sc.nextInt();
        if (cc == 1) {
            System.out.println("Enter the value of x");
        } else if (cc == 2) {
            System.out.println("Enter the value of y");
        } else {
            System.out.println("Invalid value entered");
        }


            int xPoint = sc.nextInt();
            // End of inputs

            product = 1;
            // Peforming Arithmatic Operation
            for (int i = 0; i < n; i++) {
                for (int j = 0; j < n; j++) {
                    if (j != i) {
                        product *= (xPoint - x[j]) / (x[i] - x[j]);
                    }
                }
                sum += product * y[i];

                product = 1;    // Must set to 1
            }
            System.out.println("The value at point " + xPoint + " is : " + sum);

            // End of the Program
        }
    }