Wozniak's original BASIC for the Apple II only supported integers; when Apple decided they needed floating point and Woz refused to spend time on it, they decided to license it from Microsoft, producing Applesoft BASIC. Applesoft was slower than Woz's BASIC, because it performed all arithmetic in floating point.
"In the Apple II ROMs, I even stuck in my own floating point routine. It wasn't incorporated into the BASIC, but I just didn't want the world thinking I couldn't write floating point routines." -- Steve Wozniak [0]
