And you can manually define them: const m = u"m" 50m There's actually nothing special in the compiler for unit implementation. This is just using the fact

And you can manually define them: const m = u"m" 50m There's actually nothing special in the compiler for unit implementation. This is just using the fact that `2x` is valid Julia code, where now x is something that overloads a dispatch to turn the number into a number with units. By default it uses string macros to keep the namespace clear, but you can fill the namespace with whatever you want.