Difference in code

[cibide]

Hi guys. I wrote some code and expected the result to be the same... Can't figure out why it is not. Can anyone pls explain it to me??

  int square(int l)
{
	int w = l;
	for (int y = 1; l > y; ++y) {
		w += w;
	}
	return w;
}

  int square(int l)
{
	int w = 0;
	for (int y = 0; l > y; ++y) {
		w += l;
	}
	return w;
}

[skaa]

In the first code you are adding w that is changing, in the second code you are adding l that is NOT changing.