const MAX: u32 = 100; // Compile-time constant let x: u32 = 10; // Cannot be changed
const can be used in places that need a compile-time-known value (like a fixed array size). let can't, even if it obviously holds a fixed number.
const can be used in places that need a compile-time-known value (like a fixed array size). let can't, even if it obviously holds a fixed number.