In the previous article we have discussed about Java Program to Print the Series 10 14 28 32 64 … N
In this article we are going to see how to print the series 2 3 12 37 86 167 288 …N by using Java programming language.
Java Program to Print the Series 2 3 12 37 86 167 288 …N
On observing the pattern carefully, we can see 1st number starts from 2, then the next number follows a logic
2 2 + 1^2 = 3 3 + 3^2 = 12 12 + 5^2 = 37 37 + 7^2 = 86 … and so on
Example:
2 | 3 | 12 | 37 | 86 | 167 | …… | N |
Let’s see different ways to print the series 2 3 12 37 86 167 288 …N
Method-1: Java Program to Print the Series 2 3 12 37 86 167 288 …N By Using For Loop
Approach:
- Create Scanner class object.
- Declare an integer variable say ‘
n
’ which holds the Nth term of the series. - Prompt the user to enter a number as value of
n
. - Let declare an integer variable say ‘
result
’ and initialize it to 2 - Let declare another integer variable say ‘
add
’ and initialize it to 1 - Use a for loop
from i=1 to i<=n-1
where the loop is incremented by 1 - Inside the for loop we will find the value of
result=result+(add*add)
andadd=add+2
. - Print the result in the series.
Program:
import java.util.*; public class Main { public static void main(String [] args) { //creating object of Scanner class Scanner s = new Scanner(System.in); //Taking input of number of elements in the series System.out.println("Enter the Nth term “N” "); int n = s.nextInt(); int result = 2; int add = 1; System.out.print(result); //for loop to print the series for (int i = 1; i <= n-1; i++) { result +=(add*add); System.out.print(" "+result); add+=2; } } }
Output: Enter the Nth term “N” 5 2 3 12 37 86
Method-2: Java Program to Print the Series 2 3 12 37 86 167 288 …N By Using While Loop
Approach:
- Create Scanner class object.
- Declare an integer variable say ‘
n
’ which holds the Nth term of the series. - Prompt the user to enter a number as value of
n
. - Let declare an integer variable say ‘
result
’ and initialize it to 2 - Let declare another integer variable say ‘
add
’ and initialize it to 1 - Declare and initialize an integer variable
i=1
- Continue a while loop
till i<=n-1,
wherei
is incremented by 1. - Inside while loop find the value of
result = result+(add*add)
andadd=add+2
- Print the result in the series.
Program:
import java.util.*; public class Main { public static void main(String [] args) { //creating object of Scanner class Scanner s = new Scanner(System.in); //Taking input of number of elements in the series System.out.println("Enter the Nth term “N” "); int n = s.nextInt(); int result=2; int add = 1; System.out.print(result); int i=1; while(i<=n-1) { result +=(add*add); System.out.print(" "+result); add+=2; i++; } } }
Output: Enter the Nth term “N” 7 2 3 12 37 86 167 288
Method-3: Java Program to Print the Series 2 3 12 37 86 167 288 …N By Using User Defined Method
Approach:
- Create Scanner class object.
- Declare an integer variable say ‘
n
’ which holds the Nth term of the series. - Prompt the user to enter a number as value of
n
. - Call a user defined method
printSeries()
by passingn
as parameter. - Inside method declare an integer variable say ‘
result
’ and initialize it to 2 - Let declare another integer variable say ‘
add
’ and initialize it to 1 - Use a for loop
from i=1 to i<=n-1
where the loop is incremented by 1 - Inside the for loop we will find the value of
result=result+(add*add)
andadd=add+2
. - Print the result in the series.
Program:
import java.util.*; public class Main { public static void main(String[] args) { // creating object of scanner class Scanner s = new Scanner(System.in); //Taking input of number of elements in the series System.out.println("Enter the value of Nth term 'N' "); int n = s.nextInt(); // calling printSeries method to print the series printSeries(n); } //printSeries metthod to print the series public static void printSeries(int n) { int result = 2, add = 1; System.out.print(result); //for loop to print the series for (int i = 1; i <=n-1; i++) { result +=(add*add); System.out.print(" "+result); add+=2; } } }
Output: Enter the value of Nth term 'N' 9 2 3 12 37 86 167 288 457 682
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