HackerRank – Staircase (Java)

HackerRank – Staircase (Java)

Description

https://www.hackerrank.com/challenges/staircase

Consider a staircase of size n = 4:

   #
  ##
 ###
####

Observe that its base and height are both equal to n, and the image is drawn using # symbols and spaces. The last line is not preceded by any spaces.

Write a program that prints a staircase of size n.

Input Format

A single integer, , denoting the size of the staircase.

Output Format

Print a staircase of size using # symbols and spaces.

Note: The last line must have 0 spaces in it.

Sample Input

6 

Sample Output

     #
    ##
   ###
  ####
 #####
######

Explanation

The staircase is right-aligned, composed of # symbols and spaces, and has a height and width of n = 6.

Explanation

The staircase is actually printed on a 2D array.

If (row index + column index) > n, print “#”; otherwise, print ” “.

Java Solution

import java.io.*;
import java.util.*;

public class Solution {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        for(int i = 1; i <= n; i++) {
            for(int j = 1; j <= n; j++) {
                if ((i + j) > n) {
                    System.out.print("#");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }
    }
}

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