Constants are used to substitute words for integers, which are frequently used throughout a program Here the constants refers to hardware of the box as denoted by the function of each constant and corresponding integer (e g , Hand switch, RightLever), always defined before the execution of the first state set
Constants are the terms in the algebraic expression that contain only numbers That is, they're the terms without variables We call them constants because their value never changes, since there are no variables in the term that can change its value In the expression 7x2 + 3xy + 8 the constant term is "8 "
In math, things that do not change: for example distance, volume, mass, are called constants The things that do change are called variables (cf Gathering Information from Graphs Discussion)
Also a named means to hold data, but the data cannot change during program execution