Answer to Question #317907 in Java | JSP | JSF for lolo

Question

6.      Write a Java program that will print the following series until it reaches 100.

 

1 1 2 3 5 8 13 …………………………

 

7.      Write a java program to find the sum of the series up to the nth term where n is input by the user.

1+(1+n)+(1+n+n)+(1+n+n+n)……………….nth Term

Example: input n = 6

Output: 1+7+13+19+25+31 = 96

Answer 1

public class App {


	/**
	 * The start point of the program
	 * 
	 * @param args
	 */
	public static void main(String[] args) {
		int[] fibonacciSequence = new int[100];
		fibonacciSequence[0] = 1;
		fibonacciSequence[1] = 1;
		for (int i = 2; i < 12; i++) {
			fibonacciSequence[i] = fibonacciSequence[i - 1] + fibonacciSequence[i - 2];
		}
		System.out.println("Fibonacci sequence: ");
		for (int i = 0; i < 12; i++) {
			System.out.print(fibonacciSequence[i] + " ");
		}
	}


}

import java.util.*;


class App {


	static int sumN(int n, int k) {
		int sum = 1;
		for (int i = 0; i < k; i++) {
			sum += n;
		}
		return sum;
	}


	public static void main(String[] args) {
		Scanner keyboard = new Scanner(System.in);
		System.out.print("Enter n: ");
		int n = keyboard.nextInt();
		int sum = 1;
		int k;
		System.out.print(sum + "+");
		for (int i = 1; i < n - 1; i++) {
			k = sumN(n, i);
			sum += k;
			System.out.print(k + "+");
		}
		k = sumN(n, n - 1);
		sum += k;
		System.out.print(k + " = " + sum);


		keyboard.close();
	}
}