Basic Right Triangle Number Pattern (Inverted)

Program to Print Basic Right Triangle Number Pattern (Inverted)

PRINTING PATTERN:

10987
456
32
1
            

PREREQUISITE:

Basic knowledge of Java language and loops.

ALGORITHM:

1. Take the number of rows (n) as input from the user. This will determine the height of the inverted triangle.
2. Initialize a variable (let's call it 'num') to 10. This variable will be used to print the numbers in the pattern, starting from 10.
3. Initialize a loop that runs from n down to 1 (inclusive) to iterate through each row.
4. For each row (let's call the current row index 'i'), initialize another loop that runs from 1 to 'i' (inclusive) to print the numbers in that row.
5. Inside the inner loop, print the current value of 'num', and then decrement 'num' by 1.
6. After finishing the inner loop for a row, print a newline character to move to the next row.
7. Repeat steps 3 to 6 until all rows are printed.

Code in Java:

import java.util.Scanner;

public class InvertedRightTriangleNumberPattern {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter the number of rows for the inverted right triangle number pattern:");
        int n = scanner.nextInt();  // Taking input for number of rows
        int num = 10;  // Starting number

        // Loop to print the inverted right triangle number pattern
        for (int i = n; i >= 1; i--) {  // Loop for each row
            for (int j = 1; j <= i; j++) {  // Loop for each column in the current row
                System.out.print(num);  // Printing the current number
                num--;  // Decrementing the number
            }
            System.out.println();  // New line after each row
        }

        scanner.close();
    }
}
            

Output:

Enter the number of rows for the inverted right triangle number pattern:
4
10987
456
32
1