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