module 6

Question

Can someone explain me step by step?

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);

//10
why? how?

Answer 1

Cycle 1:
result = 0 + i(0)
Cycle 2:
result = 0 + i(1)
Cycle 3:
result = 1 + i(2)
Cycle 4:
result = 3 + i(3)
Cycle 5
result = 6 + i(4)
Result = 10