# n-message

A mes­sage singling out one thing from a set of $$n$$ is some­times called an $$n$$-mes­sage. For ex­am­ple, a mes­sage singling out one thing from a set of 13 is a 13-mes­sage. An $$n$$-mes­sage car­ries $$\log_2(n)$$ bits of in­for­ma­tion. For a for­mal ac­count of what it means for a mes­sage to “sin­gle out one thing from a set of $$n$$,” see In­for­ma­tion.