Java Program to Print the Multiplication Table in Triangular Form

In this article, we will understand how to print a multiplication table in triangular form. To print in triangular form, the table will display row and column-wise. And in every row, entries will be up to the same column number.

Below is a demonstration of the same -

Input : rows = 7
Output: 
1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49

Multiplication Table in a Triangular Shape

Multiplication table in triangular form is achieved using a nested loop. The following are the steps to do this.

• Declare 3 integer variables my_input(number of lines), i(row), and j(column).

• First, initialize the value of my_input.

• Use a loop for(i=0; i<my_input; i++) to print the column number lines.

• Use a loop for(i=0; i<my_input; i++) to print the number of rows value.

• Now, use a nested loop for(j=0; j<=i; j++) to print the current value.

Example 1

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

import java.util.*;
public class MultiplicationTableTrianglePattern {
   public static void main(String args[]){
      int my_input, i, j;
      my_input = 7;
      System.out.println("The number is defined as " +my_input );
      for (i = 1; i <= my_input; i++) {
         for (j = 1; j <= i; j++) {
            System.out.print(i * j + " ");
         }
         System.out.println();
      }
   }
}

Output

The number is defined as 7
1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49

Example 2

In the following example, we accept values from the user -

import java.util.Scanner;
import java.util.*;
public class MultiplicationTableTrianglePattern {
   public static void main(String args[]){
      int my_input, i, j;
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("Enter a number ");
      my_input = my_scanner.nextInt();
      for (i = 1; i <= my_input; i++) {
         for (j = 1; j <= i; j++) {
            System.out.print(i * j + " ");
         }
         System.out.println();
      }
   }
}

Output

Enter a number
7
1
2 4
3 6 9
4 8 12 16
5 10 15 20 25
6 12 18 24 30 36
7 14 21 28 35 42 49