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Iterative Constructs in Java

Chapter 9

Iterative Constructs in Java

Class 10 - Logix Kips ICSE Computer Applications with BlueJ
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Java Program: Sum of Fraction Series n by root n

30(v). Write a program in Java to find the sum of the given series:

 

\[ \dfrac{1}{\sqrt{1}} + \dfrac{2}{\sqrt{2}} + \dfrac{3}{\sqrt{3}} + ... + \dfrac{10}{\sqrt{10}} \]

Program Type 1

Java 
public class SeriesSum
{
    public static void main(String args[]) {    
        double sum = 0;
        for (int i = 1; i <= 10; i++)
            sum += i / Math.sqrt(i);
        System.out.println("Sum = " + sum);
    }
}

Output

Sample Output
Sum = 22.4682781862041

Program Type 2

Java 
import java.util.Scanner;

public class SeriesIoverRootI {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        System.out.print("Enter the number of terms n: ");
        int n = sc.nextInt();

        double sum = 0.0;

        for (int i = 1; i <= n; i++) {
            sum += i / Math.sqrt(i);
        }

        System.out.println("Sum of the series is: " + sum);

        sc.close();
    }
}

Output

Sample Input / Output
Enter the number of terms n: 10
Sum of the series is: 22.4682781862041
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