Probably simple question about for loops

[galvin]

I want to have a for loop that starts at 10 and increases by 10 each time (for 9 loops), rather than increasing just by 1. How do I indicate that I want $i to go up by 10, instead of by 1.  In other words, what do I write instead of "$i++"?

 

for ($i=10; $i<=90; ?????) 

 

 

[QuickOldCar]

<?php
for($i=10;$i<=100;$i +=10){
echo $i."<br>";
}
?>

 

result:

10

20

30

40

50

60

70

80

90

100

[galvin]

Awesome thanks!