In C# I see that
-1 * int.MinValue == int.MinValue
Is this a bug? It really screwed me up when I was trying to implement a search tree. I ended up using (int.MinValue + 1)
so that I could properly negate it.
This is not a bug.
int.MinValue * -1
is 1
greater than int.MaxValue
can hold. Thus, the number wraps around back to int.MinValue
.
This is basically caused by an integer overflow.
The value of this constant is
-2,147,483,648
The value of this constant is
2,147,483,647
So, -2,147,483,648 * -1 = 2,147,483,648
which is 1
greater than Int32.MaxValue
.