Constant
In plain terms
A named value that cannot be changed after assignment.
Going deeper
A constant binds a name to a fixed value that stays the same throughout execution, improving clarity and safety. It won't change.
Under the hood
Prevents accidental modification; signals intent and can enable compiler optimizations.
Examples
PI = 3.14159, config values, const/final keywords, fixed settings.
Think of it like...
Like a permanent label on a value that's sealed and never altered.