Help!!!

Question

I got this question in the learn php module:

function func($arg) {
$result = 0;
for($i=0; $i<$arg; $i++) {
$result = $result + $i;
}
return $result;
}
echo func(5);

what is the result of the function?

can anyone give me a good explanation of how the answer is 10 im quite confused

Answer 1

here , u passed 5 in func, hence arg=5.
Now lets see the loop,
for($i=0;$i<5;$i++)
Here i will have values 0,1,2,3,4.

Then you add result = result + i;
this means
result = 0 + 0; //for first iteration i=0
then for the following iterations ,
result = 0+1;here result is 0(0+0) and i is 1
result = 1+2; here result is 1(0+1)and i is 2
result = 3+3;here result is 3 (1+2)and i is 3
result = 6+4 ;here result is 6(3+3)and i is 4

which is 10.

Answer 2

thank you man it just became a whole lot clearer

Answer 3

Anytime bro

Answer 4

thanks ...took a while but grabbed it!