[Solved] Expression Evaluation with Java

Expression Evaluation: In the Mini project 7th module is to evaluate the expression y = x + x^2+……..+x^n. Rita allotted this function to Malini. Collect and display the values returned by the called function. Test your program and report the results obtained.
Help Malini to write a program to evaluate the expression?

Get the value of x and n from the user as input
Use the following function:
int calculate(int x,int n)

where the first argument corresponds to the value of x and second corresponds to n respectively.

Sample Input and Output :

Enter the value of x
2
Enter the value of n
3
The result is
14

Solution

import java.util.*;
import static java.lang.Math.*;
class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.println("Enter the value of x");
        int x = in.nextInt();
        System.out.println("Enter the value of n");
        int n = in.nextInt();
        //sauravhathi
        System.out.println("The result is\n"+calculate(x, n));
    }
    public static int calculate(int x, int n) {
        int sum = 0;
        for (int i = 1; i <= n; i++)
        {
            sum = sum + (int)pow(x, i);
        }
        return sum;
    }
}

Happy Learning – If you require any further information, feel free to contact me.