SimpleInterest.java

package org.evryword.simpleinterest;

public class SimpleInterest {
    public static void main(String[] args) {
        final double totalInterest = calculateSimpleInterest();
        System.out.format("[totalInterest] %f", totalInterest);
    }

    public static double calculateSimpleInterest() {
        final int n = 10;
        double a = 0;
        final int p = 1000;
        final double r = 5 / 100;

        for (int i = 0; i < n; i++) {
            a = a + (p * (1 + r) * (i + 1));
        }

        return a;
    }

}