Staircase

Consider a staircase of size n = 4:

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   #
  ##
 ###
####

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.

Function Description

Complete the staircase function in the editor below. It should print a staircase as described above.

staircase has the following parameter(s):

• n: an integer

Input Format

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

Constraints

0 < n <= 100

Output Format

Print a staircase of size n using # symbols and spaces.

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

Sample Input

1

6

Sample Output

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3
4
5
6

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

Explanation

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

Solution

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// Complete the staircase function below.
function staircase(n) {
    new Array(n).fill('#'.repeat(n)).reduce((target, item, index) => {

        item = item.replace(/\#/g, (value, itemIndex) => (itemIndex < n - index - 1) ? ' ' : value);

        console.log(item);

        return target;
    }, []);
}