Java Program to Print Square Number Series 1 4 9 16 … N

In the previous article, we have discussed about Java Program to Print the Series -1 4 -7 10 -13 16 -19 … N

In this article we are going to see how to print the series 1 4 9 16 25….N by using Java programming language.

Java Program to Print Square Number Series 1 4 9 16 … N

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

For example:

……

1*1 2*2 3*3 4*4 5*5 6*6 7*7 n*n

Let’s see different ways to print the series 1 4 9 16 25….N.

By Using for Loop
By using while Loop
By Using User Defined Method

Method-1: Java Program to Print Square Number Series 1 4 9 16 … N By Using for Loop

Approach:

Declare an int variable say ‘n’ which holds the nth term of the series.
Create Scanner class object.
Prompt the user to enter a number input for ‘n‘.
Iterate a for loop from i=1 to i<=n
Inside for loop print the result as i*i

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 number of term ofin the series:");
        int n=s.nextInt();
        //printing the series by using for loop
        for(int i = 1; i<=n; i++)
        {
            System.out.print(i * i + " ");
        }
   }
}

Output:

Enter the number of term ofin the series:
5
1 4 9 16 25

Method-2: Java Program to Print Square Number Series 1 4 9 16 … N By Using while Loop

Approach:

Declare an int variable say ‘n’ which holds the nth term of the series.
Create Scanner class object.
Prompt the user to enter a number input for ‘n‘.
Declare and Initialize integer variable i=1
Iterate a while loop till i<=n
Inside while loop print the result as i*i

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 number of term of in the series:");
        int n=s.nextInt();
        //Declared and Initialized an integer variable 'i'
        int i = 1;
        //printing the series by using while loop
        while(i<=n)
        {
            System.out.print(i * i + " ");
            //incrementing i value by 1
            i++;
        }
   }
}

Output:

Enter the number of term of in the series:
8
1 4 9 16 25 36 49 64

Method-3: Java Program to Print Square Number Series 1 4 9 16 … N By Using while Loop

Approach:

Declare an int variable say ‘n’ which holds the nth term of the series.
Create Scanner class object.
Prompt the user to enter a number input for ‘n‘.
Declare and Initialize integer variable i=1
Then call a user defined method printSeries() by passing i and n value as parameter.
Inside user defined method take a while loop and iterate till i<=n
And Inside while loop print the result as i*i

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 number of term of in the series:");
        int n=s.nextInt();
        //Declared and Initialized an integer variable 'i'
        int i = 1;
        //calling user defined method printSeries()
        printSeries(n, i);
   }
   
   //user defined method to print the series
   public static void printSeries(int n, int i)
    {    
        //printing the series by using while loop
        while(i<=n)
        {
            System.out.print(i * i + " ");
            //incrementing i value by 1
            i++;
        }
   }
}

Output:

Enter the number of term of in the series:
6
1 4 9 16 25 36

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