GO challenges - staircase problem

Problem

HackerRank

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 .

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.

Output Format

Print a staircase of size n 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.

Solution

package main

import (
    "fmt"
    "io"
    "os"
    "strings"
)

var stdin io.Reader = os.Stdin
var stdout io.Writer = os.Stdout
var stderr io.Writer = os.Stderr

func main() {
    var n int
    fmt.Fscanf(stdin, "%d", &n)
    for i := 1; i <= n; i++ {
        fmt.Fprintf(stdout, "%s%s\n", strings.Repeat(" ", n-i), strings.Repeat("#", i))
    }
}