> The trick seems to have been diving (10-10) by itself and falsely giving 1 as the answer rather than the infinity it is supposed to be Most probably that's w

> The trick seems to have been diving (10-10) by itself and falsely giving 1 as the answer rather than the infinity it is supposed to be Most probably that's where the error is hidden, but it's not supposed to be infinity. Never mistake such an invalid operation for one resulting in a symbol. The operation is just invalid, there's nothing more to it. For your intuition to build up a little on this, why not negative infinity? This one matches just as well. Arithmetics simply has no concept of infinity. You get this concept when you move to set theory (count of natural numbers) or to calculus (limits), but not on the arithmetics level.