immutable by default—they’re always immutable. You declare constants using the
`const` keyword instead of the `let` keyword, and the type of the value *must*
be annotated. We’ll cover types and type annotations in the next section,
-[“Data Types,”][data-types]<!-- ignore -->, so don’t worry about the details
+[“Data Types”][data-types]<!-- ignore -->, so don’t worry about the details
right now. Just know that you must always annotate the type.
Constants can be declared in any scope, including the global scope, which makes