Output:
3 3 4 3 4 5 3 4 5 6 3 4 5 6 7 3 4 5 6 7 8 function Triangle ($begin, $end) { if ($begin < 0 || $end < 0) { return; } if ($begin == $end) { return $a; } else { // non recursive for ($i = 1; $i <= $end; $i++) { for ($j = $begin; $j <= $i; $j++) { echo $j . " "; } echo "<br>"; } } } This is what I made so far.
Here's one way:
function triangle ($begin, $end, $row = 1) { //stop when we've printed up to end if($end - $begin + 1 < $row) return; //let's start at the beginning :) for($i = 0; $i < $row; $i++){ //the row number increments each time so we can keep adding. echo ($begin + $i)." "; } echo "<br>"; //now recurse... triangle($begin, $end, $row + 1); } Usage:
triangle(3,9); Output:
3 3 4 3 4 5 3 4 5 6 3 4 5 6 7 3 4 5 6 7 8 3 4 5 6 7 8 9 This should work for you:
(Here I just added the variable step which defines how many steps you make from $begin to $end and if $begin + $step == $end the function is done. If not It starts from $begin and makes X steps and as long as it doesn't reach the end I call the function again with a step more)
<?php function Triangle($begin, $end, $step = 0) { for($count = $begin; $count <= ($begin+$step); $count++) echo "$count "; echo "<br />"; if(($begin + $step) == $end) return; else Triangle($begin, $end, ++$step); } Triangle(3, 8); ?> output:
3 3 4 3 4 5 3 4 5 6 3 4 5 6 7 3 4 5 6 7 8 