In the previous article, we have discussed about Java Program to Print Triangular Number Series 1 3 6 10 15 …N

In this article we are going to see how to print Pell number series 0 1 2 5 12 29 70 …N by using Java programming language. What is pell series in java, Pell Number In Java, 1 2 5 12 29 Series to print pell program, Number Series Program In Java, Number Series In Java.

**Java Program to Print Pell Number Series 0 1 2 5 12 29 70 …N**

On observing the pattern carefully, we can see the numbers in the series are pell number.

The sequence of Pell numbers starts with 0 and 1, and then each Pell number is the sum of twice the previous Pell number and the Pell number before that.

**Example:**

Initial = 0, 1 Next no = 2*1 + 0 = 2 Next no = 2*2 +1 = 5 Next no = 2*5 + 2 = 12 Next no= 2*12 + 5 = 29

Let’s see different ways to print Pell number series 0 1 2 5 12 29 70 …N

### Method-1: Java Program to Print Pell Number Series 0 1 2 5 12 29 70 …N By Using For Loop

**Approach: **

- Declare an int variable say ‘n’ and assign the value to it, which holds the nth value of the series
- Create Scanner class object.
- Prompt the user to enter a number as value of
`n`

. - Use a for loop from i=1 to i<=n
- Inside for loop find each term by using concept of Pell number.
- Print the result.

**Program:**

import java.util.*; public class Main { public static void main(String[] args) { //Scanner class object created Scanner s = new Scanner(System.in); //taking input of 'n' value from user System.out.println("Enter the nth value of the series:"); int n=s.nextInt(); int a = 0, b=1; for(int i = 1; i<=n; i++) { int c = b + 2*a; b=a; a=c; System.out.print(c+ ", "); } } }

Output: Enter the nth value of the series: 10 1, 2, 5, 12, 29, 70, 169, 408, 985, 2378,

### Method-2: Java Program to Print Pell Number Series 0 1 2 5 12 29 70 …N By Using While Loop

**Approach: **

- Declare an int variable say ‘n’ which holds the nth value of the series.
- Create Scanner class object.
- Prompt the user to enter a number as value of
`n`

. - Continua a a while loop from i=1 till i<=n
- Inside for loop find each term by using concept of Pell number.
- Print the result

**Program:**

import java.util.*; public class Main { public static void main(String[] args) { //Scanner class object created Scanner s = new Scanner(System.in); //taking input of 'n' value from user System.out.println("Enter the nth value of the series:"); int n=s.nextInt(); int a = 0, b=1; // using while loop to print the series int i = 1; while( i<=n) { int c = b + 2*a; b=a; a=c; System.out.print(c+ ", "); i++; } } }

Output: Enter the nth value of the series: 10 1, 2, 5, 12, 29, 70, 169, 408, 985, 2378,

### Method-3: Java Program to Print Pell Number Series 0 1 2 5 12 29 70 …N By Using User Defined Method

**Approach:**

- The same logic as method 1 but this time we are moving the for inside a user-defined method.
- Create Scanner class object.
- Prompt the user to enter a number as value of
`n`

. - Use a for loop from i=1 to i<=n
- Inside for loop find each term by using concept of Pell number.
- Print the result.

**Program:**

import java.util.*; public class Main { public static void main(String[] args) { //Scanner class object created Scanner s = new Scanner(System.in); //taking input of 'n' value from user System.out.println("Enter the nth value of the series:"); int n=s.nextInt(); m1(n); } public static void m1(int n) { int a = 0, b=1; for(int i = 1; i<=n; i++) { int c = b + 2*a; b=a; a=c; System.out.print(c+ ", "); } } }

Output: Enter the nth value of the series: 10 1, 2, 5, 12, 29, 70, 169, 408, 985, 2378,

The best and excellent way to learn a java programming language is by practicing Simple Java Program Examples as it includes basic to advanced levels of concepts.

Recommended Reading On: Python Program to Generate first N numbers of Pell Series

**Try these for sample to know the knowledge of yourself on this topic:**

- – ‘0’ In Java
- 0′ In Java
- N 2 Java
- 1,2,5,12,29
- What
- 1, -2, 5, -12, 29, -70, 169,
- What Is Pell Series
- Print Series In Java
- How To Print Series In Java
- Print The Series In Java
- Series Program In Java

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