Pattern Problem #1

Write a Java program that takes an integer n as input from the user and prints a pattern of numbers in the form of a right triangle. In each row, the program should print the numbers from 1 to the row number separated by spaces. The first row should contain the number 1, the second row should contain the numbers 1 and 2, the third row should contain the numbers 1, 2, and 3, and so on, up n rows.

import java.util.Scanner;

public class Pattern {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();

        // Loop for printing rows
        for (int i = 1; i <= n; i++) {
            // Loop for printing columns
            for (int j = 1; j <= i; j++) {
                System.out.print(j + " ");
            }
            System.out.println();
        }
    }
}

Explanation:

1. First, we import the Scanner class to get user input.
2. We create a Scanner object sc to get input from the user.
3. We read an integer n from the user using the nextInt() method of the Scanner class.
4. We use a nested loop to print the required pattern.
5. The outer loop runs from 1 to n for printing n rows.
6. The inner loop runs from 1 to i for printing i columns in each row.
7. We print the column number followed by a space using the print() method.
8. After printing all the columns in a row, we move to the next line using the println() method.

Example:

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Input:

5

Output:

1 
1 2 
1 2 3 
1 2 3 4 
1 2 3 4 5