In the previous article, we have discussed about Java Program to Print Series 2 4 6 8 10 12 …N
In this article we are going to see how to print the series 3 6 9 12 15 18 …N by using Java programming language.
Java Program to Print Series 3 6 9 12 15 18 …N
In this series it can be seen that
- Numbers at each position ‘
i
‘, the term is calculated as3×i
OR - First element of series is 3 and next elements are calculated as
previous element + 3
For example, if the series has 3 terms, the output will be
3×1 3×2 3×3
3 6 9
For example, if the series has 5 terms, the output will be
3×1 3×2 3×3 3×4 3×5
3 6 9 12 15
Let’s see different ways to find the series.
Method-1: Java Program to Print Series 3 6 9 12 15 18 …N By Using Multiplication
Approach:
- Create Scanner class object.
- Declare an integer variable ‘
n
‘ which holds the value of number of terms in the series. - Prompt the user to enter the value of variable ‘
n
‘ - Run a for loop from
i=0 to i<=n
. - Inside the loop, print
3*i
Program:
import java.util.Scanner; public class Main { public static void main(String[] args) { //create a Scanner object Scanner sc = new Scanner(System.in); //prompt the user to enter the number of terms System.out.print("Enter the number of terms: "); int n = sc.nextInt(); //print the series System.out.print("The series is: "); for (int i = 1; i <= n; i++) { System.out.print(3*i + " "); } } }
Output: Enter the number of terms: 10 The series is: 3 6 9 12 15 18 21 24 27 30
Method-2: Java Program to Print Series 3 6 9 12 15 18 …N By Using Addition
Approach:
- Create Scanner class object.
- Declare an integer variable ‘
n
‘ which holds the value of number of terms in the series. - Declare an integer variable say ‘
value
‘ and initialize it with value 3. - Prompt the user to enter the value of variable ‘
n
‘ - Print ‘
value
‘ which is having value 3. - Run a for loop from
i=0 to i<n-1
. - Inside the loop, print
value+3
, as by using addition logic when we will add previous element with 3 then we will get next element of the series.
Program:
import java.util.Scanner; public class Main { public static void main(String[] args) { // create a Scanner object Scanner sc = new Scanner(System.in); // prompt the user to enter the number of terms System.out.print("Enter the number of terms: "); int n = sc.nextInt(); int value=3; // print the series System.out.print("The series is: "); System.out.print(value+" "); for (int i = 0; i < n-1; i++) { value=value+3; System.out.print(value+" "); } } }
Output: Enter the number of terms: 5 The series is: 3 6 9 12 15
Method-3: Java Program to Print Series 3 6 9 12 15 18 …N By Using User Defined Method
Approach:
- Create Scanner class object.
- Declare an integer variable ‘
n
‘ which holds the value of number of terms in the series. - Prompt the user to enter the value of variable ‘
n
‘ - Then call a user defined method by passing
n
as parameter. - Inside method run a for loop from i=0 to i<=n.
- Inside the loop, print
3*i
Program:
import java.util.Scanner; public class Main { public static void main(String[] args) { //create a Scanner object Scanner sc = new Scanner(System.in); //prompt the user to enter the number of terms System.out.print("Enter the number of terms: "); int n = sc.nextInt(); //call the method to print the series printSeries(n); } //user defined method printSeries() to print series private static void printSeries(int n) { System.out.println("The series is: "); for (int i = 1; i <= n; i++) { System.out.print(3*i + " "); } } }
Output: Enter the number of terms: 8 The series is: 3 6 9 12 15 18 21 24
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