how this code i want explanation

Question

static int Pow(int x, int y=2)
{
int result = 1;
for (int i = 0; i < y; i++)
{
result *= x;
}

return result;
}

Answer 1

It is a code for power number:
if you input only 2 (y is default)
it will power 2 meaning is 2*2=4
if you talk on looping:
loop 1 i=0 x=2 result=2
loop 2 i=1 x=2 result=4
and it output 4

Answer 2

No the Output is 36