Case Study
Consider a staircase of size :
#
##
###
####
Observe that its base and height are both equal to , 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 .
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 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 .
Solution
<?php
$handle = fopen ("php://stdin","r");
fscanf($handle,"%d",$n);
for ($i=0; $i < $n; $i++) {
for ($j=0; $j < $n; $j++) {
if ($j>=$n-1-$i) {
echo '#';
}else{
echo " ";
}
}
echo "\n";
}
?>