what is wrong with my code

Do this:                             Add " " .

for ($i = 10; $i < 101; $i = $i + “” . 10) { echo $i; } Then just erase that part, glitch went away for me.

Final REsult = for ($i = 10; $i < 101; $i = $i + 10) { echo $i; }

You forgot to use closing brackets for the for loop!

<?php
for ($i = 10; $i < 11; $i++) {
echo $i;
}
?>

1. Refresh your page
2. add <p>$i</p> to your echo