Print powers of 2 java – Java Program to Print the Series 2 4 16 256 … N

Print powers of 2 java: In the previous article we have discussed about Java Program to Print Series 0 3 8 15 24 35 48…N

In this article we are going to see how to print the series 2 4 16 256 … N by using Java programming language.

Java Program to Print the Series 2 4 16 256 … N

On observing the pattern carefully, we can see

1st number starts from 2

Then the next number is the square of the previous number

Example:

 2 4 16 256 65536 …… N-1 N

2^2              4^2             16^2            256^2         65536^2                           (N-1)^2

Let’s see different ways to print the series 2 4 16 256 … N

Method-1: Java Program to Print the Series 2 4 16 256 … 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 a long variable say ‘result’ and initialize it to 2
• 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 square of the result and then again we will store that value with the 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 Nth term “N” ");
int n = s.nextInt();
long result = 2;
System.out.print(result);
//for loop to print the series
for (int i = 1; i <= n-1; i++)
{
result *=result;
System.out.print(" "+result);
}
}
}


Output:

Enter the Nth term “N”
5
2 4 16 256 65536

Method-2: Java Program to Print the Series 2 4 16 256 … 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 a long variable say ‘result’ and initialize it to 2
• Declare and initialize an integer variable i=1
• Continue a while loop till i<=n-1, where i is incremented by 1.
• Inside the while loop we will find the value of square of the result and then again we will store that value with the 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 Nth term “N” ");
int n = s.nextInt();
long result=2;
System.out.print(result);
int i=1;
while(i<=n-1)
{
result *=result;
System.out.print("  "+result);
i++;
}
}
}

Output:

Enter the Nth term “N”
6
2 4 16 256 65536 4294967296

Method-3: Java Program to Print the Series 2 4 16 256 … 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 passing n as parameter.
• Inside method declare a long variable say ‘result’ and initialize it to 2
• 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 square of the result and then again we will store that value with the 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 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)
{
long result = 2;
System.out.print(result);
//for loop to print the series
for (int i = 1; i <=n-1; i++)
{
result *=result;
System.out.print(" "+result);
}
}
}

Output:

Enter the value of Nth term 'N'
6
2 4 16 256 65536 4294967296

Don’t miss the chance of Java programs examples with output pdf free download as it is very essential for all beginners to experienced programmers for cracking the interviews.

Related Java Programs: