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.
Expressions and Operators. An expression is a statement that can convey a value. Some of the most common expressions are mathematical, such as in the following source code example: int x = 3; int y = x; int z = x * y; All three of these statements can be considered expressionsâthey convey values that can be assigned to variables.