Question

What is a constant?

Answer 1

A constant is something which doesn't change.

Answer 2

a constant is a number that does not change. like 1 or 3. the oppositie of a constant is something like x that can have changing values, which is why we don't represent it as a number

Answer 3

http://en.wikipedia.org/wiki/Constant will give you a detailed answer. this is a vague question..