I would calculed the sum the 1 to 10 by for in php,this code is true or false?

Question

<?php
for($i=1;$i<=10;$i++){
$i+=$i;
}
echo "$i";
?>

Answer 1

Nope... define a variable sum before the loop and set it to zero. add i in the loop to sum. after the loop, output sum.
also you don't need the quotation marks in echo if you only want to output a variable.

Answer 2

thinks my friend