What output results from the following code?

Question

What output results from the following code?
function func($arg) {
$result = 0;
for($i=0; $i<$arg; $i++) {
$result = $result + $i;
}
return $result;
}
echo func(5);

--------------------------------------------------------

The output is "10" but why and how ?! i dont understand !

Answer 1

Follow the loop and track every iteration.
i=0 : 0+0=0
i=1 : 0+1=1
i=2 : 1+2=3
i=3 : 3+3=6
i=4 : 6+4=10
i=5 : nothing happens because i is no longer less than 5.
Final result 10.

Answer 2

ans: 10

Answer 3

Add a little verbosity to your code, I guess it will explain itself better than I could : )

<?php
function func($arg) {
$result = 0;
for($i=0; $i<$arg; $i++) {
echo "\$result ($result) + \$i ($i) = ";
$result = $result + $i;
echo "$result<br />";
}
return $result;
}
echo func(5);

?>

Hth, cmiiw

Answer 4

1997

Answer 5

10

Answer 6

10

Answer 7

15+1982
1997

Answer 8

The ans is x

is x

Answer 9

What output results from the following code?
<?php
$someString = "15";
$birthyear = 1982;
echo $someString + $birthyear;
?>
How to solve