How can I print integer in triangle form

algorithm, complexity-theory, php

Solution

Another integer solution:

$n = 9; 
print str_pad ("✭",$n," ",STR_PAD_LEFT) . PHP_EOL;
for ($i=0; $i<$n; $i++){
    print str_pad ("", $n - $i);
    for ($ii=-$i; $ii<=$i; $ii++){
      if ($i % 2 != 0 && $ii % 2 == 0)
        print "&#" . rand(10025,10059) . ";";
      else print $i - abs($ii) + 1;
    }
    print PHP_EOL;
}

        ✭
        1 
       1✬1 
      12321 
     1❊3✪3✳1 
    123454321 
   1✼3✶5❃5❈3✸1
  1234567654321 
 1✾3✯5✿7❉7✫5✷3✶1 
12345678987654321

Or if you already have the string, you could do:

$n = 9; $s = "12345678987654321"; $i = 1;

while ($i <= $n)
   echo str_pad ("", $n-$i) . substr ($s,0,$i - 1) . substr ($s,-$i++) . PHP_EOL;

Problem

I want to print integer in triangle form which look like this ``` 1 121 12321 ``` I tried this but I do not get the actual result ``` for($i=1;$i<=3;$i++) { for($j=3;$j>=$i;$j--) { echo "&nbsp;&nbsp;"; } for($k=1;$k<=$i;$k++) { echo $k; } if($i>1) { for($m=$i; $m>=1; $m--) { echo $m; } } echo "<br>"; } ``` Output of this code is: ``` 1 1221 123321 ``` Where am I going wrong, please guide me.

Original source