Java Program to Print the Series 7 26 63 124 215 ... N

In the previous article we have discussed about Java Program to Print the Series 2 3 10 39 117 885 … N

In this article we are going to see how to print the series 7 26 63 124 215 .. N by using Java programming language.

Java Program to Print the Series 7 26 63 124 215 … N

On observing the pattern carefully, we can see the series follows a logic

2^3-1 = 7
3^3-1 = 26
4^3-1 = 63
5^3-1 = 124 … and so on.

Example:

124

215

342

……

2^3-1 3^3+1 4^3-1 5^3-1 6^3-1 7^3-1

Let’s see different ways to print the series 7 26 63 124 215 .. N.

By Using For Loop
By Using While Loop
By Using User Defined Method

Method-1: Java Program to Print the Series 7 26 63 124 215 … N By Using For Loop

Approach:

Create Scanner class object.
Declare an integer variable say ‘n’ which holds the number of terms in the series.
Prompt the user to enter a number as value of n.
Let declare a double variable say ‘result’
Use a for loop from i=2 to i<=n+1 where the loop is incremented by 1
Inside the for loop we will find the value of result=i^3 - 1
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();
        double result;
        //for loop to print the series
        for (int i = 2; i <= n+1; i++) 
        {
            result = Math.pow(i,3)-1; 
            System.out.print((int)result+" ");
        } 
    }
}

Output:

Enter the Nth term “N” 
5
7 26 63 124 215

Method-2: Java Program to Print the Series 7 26 63 124 215 … N By Using While Loop

Approach:

Create Scanner class object.
Declare an integer variable say ‘n’ which holds the number of terms in the series.
Prompt the user to enter a number as value of n.
Let declare a double variable say ‘result’
Declare and initialize an integer variable i=2
Continue a while loop till i<=n+1, where i is incremented by 1.
Inside while loop find the value of result = (i^3)-1
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();
        double result;
        int i=2;
        while(i<=n+1)
        {
            result = Math.pow(i,3)-1; 
            System.out.print((int)result+" ");
            i++;
        }      
    }
}

Output:

Enter the Nth term “N” 
7
7 26 63 124 215 342 511

Method-3: Java Program to Print the Series 7 26 63 124 215 … N By Using User Defined Method

Approach:

Create Scanner class object.
Declare an integer variable say ‘n’ which holds the number of terms in the series.
Prompt the user to enter a number as value of n.
Call a user defined method printSeries() by passing n as parameter.
Inside method declare a double variable say ‘result’
Use a for loop from i=2 to i<=n+1 where the loop is incremented by 1
Inside the for loop we will find the value of result=i^3 - 1
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)
    {
        double result;
        //for loop to print the series
        for (int i = 2; i <=n+1; i++) 
        {
            result = Math.pow(i,3)-1; 
            System.out.print((int)result+" ");
        } 
    }
}

Output:

Enter the value of Nth term 'N' 
9
7 26 63 124 215 342 511 728 999

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