With IEEE floats, 0 has a sign which can be used to denote the direction of the limit; if you try 1/(-0) in any program or language with sane numerics (i.e. not

With IEEE floats, 0 has a sign which can be used to denote the direction of the limit; if you try 1/(-0) in any program or language with sane numerics (i.e. not Excel or other dumb calculator emulators), it should give you -Infinity.