Depends on how you look at it. A true constant won't change between runs of the code. I.e. it is essentially a symbolic name for a literal. A constant variabl

Depends on how you look at it. A true constant won't change between runs of the code. I.e. it is essentially a symbolic name for a literal. A constant variable OTOH, varies in different executions of the code. So, its invariance is linked to an execution context.