Java: Print a pattern like right angle triangle

Last update on May 14 2025 13:01:04 (UTC/GMT +8 hours)

Right-Angle Triangle Repeating Numbers

Write a program in Java to make such a pattern like a right angle triangle with a number which repeats a number in a row.
The pattern is as follows :

1
22
333
4444

Test Data
Input number of n : 4

Pictorial Presentation:

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise17 {

  public static void main(String[] args)

			{
   	          int i,j,n;

               System.out.print("Input number of n : ");
            	Scanner in = new Scanner(System.in);
		    n = in.nextInt();
  
               for(i=1;i<=n;i++)
               {
	           for(j=1;j<=i;j++)
	            System.out.print(i);
	          System.out.println("");
              }
            }
            } 
			 

Sample Output:

Input number of n : 4                                                                                         
1                                                                                                       
22                                                                                                       
333                                                                                                       
4444

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to print a triangle pattern where each row consists of the row number repeated using string multiplication.
• Write a Java program to generate a right-angle triangle with repeating digits using recursion.
• Write a Java program to create a triangle pattern with repeating numbers and then output its inverted form.
• Write a Java program to build a triangle pattern of repeating numbers and then count the total digits printed.

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