Pregunta

Question

function func($arg) {

$result=0

for ($i=0; $i <$arg; $i++) {

$result=$result+2;

}

return $result;

}

echo func(5);

Porque todo esto da un resultado de 10 si result=0 y solo le sumo 2

Answer 1

because the loop goes for 5 times and you add to result its previous value's
i = 0 -> result = 0 + 2;
adding 1 to i
i = 1 -> result = 2 + 2;
adding 1 to i
i = 2 -> result = 4 + 2;
adding 1 to i
i = 3 -> result = 6 + 2;
adding 1 to i
i = 4 -> result = 8 + 2;
adding 1 to i
i = 5
now i is not < 5 so
return result that is 10