What is the difference between 24VAC and DC 24V1.0A output?

I can say that 24VAC means 24 volts alternating current. 24VDC @ 1A means 24 volts direct current delivered at 1 ampere. So the difference I suppose would be: 1. Alternating current VS. Direct current 2. X Amperes(VAC) VS. 1 Ampere (VDC)