How to print this series?
Below is the logic for printing this series,
1 = (0 * 0) + 1
2 = (1 * 1) + 1
5 = (2 * 2) + 1
10 = (3 * 3) + 1
17 = (4 * 4) + 1
We are going to see two solutions here to print this series,
Solution #1:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | package com.javacodepoint.series;import java.util.Scanner;/** * Series pattern: 1, 2, 5, 10, 17 * * @author javacodepoint.com * */public class SeriesPattern1 { public static void main(String[] args) { // Create scanner object to read user inputs Scanner sc = new Scanner(System.in); System.out.println("Enter no. of elements you want in the series: "); int n = sc.nextInt(); System.out.print("Series: "); for (int i = 0; i < n; i++) { // Calculate the element of the series int element = (i*i) + 1; // Print the element with comma(,) separator System.out.print(element + ", "); } }} |
OUTPUT:
Enter no. of elements you want in the series:
6
Series: 1, 2, 5, 10, 17, 26,
Solution #2:
By using Math.pow() method,
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | package com.javacodepoint.series;import java.util.Scanner;/** * Series pattern: 1, 2, 5, 10, 17 * * @author javacodepoint.com * */public class SeriesPattern2 { public static void main(String[] args) { // Create scanner object to read user inputs Scanner sc = new Scanner(System.in); System.out.println("Enter no. of elements you want in the series: "); int n = sc.nextInt(); System.out.print("Series: "); for (int i = 0; i < n; i++) { // Calculate the element of the series int element = (int) (Math.pow(i, 2) + 1); // Print the element with comma(,) separator System.out.print(element + ", "); } }} |
OUTPUT:
Enter no. of elements you want in the series:
5
Series: 1, 2, 5, 10, 17,