# Java Program to Print the Series 6 12 24 48 96 …N

In the previous article we have discussed about Java Program to Print Series 5 10 20 40 80 160 …N

In this article we are going to see how to print the series  6 12 24 48 96 …N by using Java programming language

## Java Program to Print the Series 6 12 24 48 96 …N

On observing the pattern carefully, we can see the series starts from 6 and next element is 2 times of previous element.

Example:

Suppose value of N=5
Then series=
6 12 24 48 96

Let’s see different ways to print the series 6 12 24 48 96 …N

### Method-1: Java Program to Print the Series 6 12 24 48 96 …N By Using For Loop

Approach:

• Declare an integer variable say ‘n’ which holds number of terms in the series.
• Create Scanner class object.
• Prompt the user to enter a number as value of n.
• Let declare an integer variable ‘result‘ and initialize it to 6
• Use a for loop from i=1 to i<n incremented by 1
• Inside for loop we will increment the result with 2 times of the previous result.
• 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 “N” ");
int n = s.nextInt();
int result = 6;
System.out.print(result);
//for loop to print the series
for (int i = 1; i < n; i++)
{
result *=2;
System.out.print(" "+result);
}
}
}

Output:

Enter the value of  “N”
5
3 6 12 24 48

### Method-2: Java Program to Print the Series 6 12 24 48 96 …N By Using While Loop

Approach:

• Declare an integer variable say ‘n’ which holds number of terms in the series.
• Create Scanner class object.
• Prompt the user to enter a number as value of n.
• Let declare an integer variable ‘result‘ and initialize it to 6
• Declare and initialize an integer variable i=1
• Continue a while loop till i<n incremented by 1
• Inside while loop we will increment the result with 2 times of the previous result.
• Print the result in the series.

Program:

import java.util.*;
public class Main
{
public static void main(String [] args)
{
Scanner s = new Scanner(System.in);
//Taking input of number of elements in the series
System.out.println("Enter the value of “N” ");
int n = s.nextInt();
int result=6;
System.out.print(result);
int i=1;
while(i<n)
{
result *=2;
System.out.print(" "+result);
i++;
}
}
}

Output:

Enter the value of “N”
7
3 6 12 24 48 96 192

### Method-3: Java Program to Print the Series 6 12 24 48 96 …N By Using User Defined Method

Approach:

• Declare an integer variable say ‘n’ which holds number of terms in the series.
• Create Scanner class object.
• Prompt the user to enter a number as value of n.
• Call a user defined method say printSeries() by passing ‘n‘ as parameter.
• Inside method declare an integer variable ‘result‘ and initialize it to 6
• Use a for loop from i=1 to i<n incremented by 1
• Inside for loop we will increment the result with 2 times of the previous result.
• 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 'N' ");
int n = s.nextInt();
// calling printSeries method to print the series
printSeries(n);
}
public static void printSeries(int n)
{
int result = 6;
System.out.print(result);
//for loop to print the series
for (int i = 1; i <n; i++)
{
result *=2;
System.out.print(" "+result);
}
}
}

Output:

Enter the value of N'
9
3 6 12 24 48 96 192 384 768

Guys who are serious about learning the concepts of the java programming language should practice this list of programs in java and get a good grip on it for better results in exams or interviews.

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