Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
The main difference between an equation and a function is the fact that an equation usually deals with a single input, whereas, a function can have numerous inputs. In mathematics, an equation is used to denote the equality between two expressions.
Definition - What does Expression mean? An expression is a particular concept in computer science in which a number of variables or constants, and operators and functions, are put together in a single statement that is acted on by a particular programming language. In computer science, expressions are written by developers, interpreted by computers and 'evaluated.â.