In Clojure 1.5.1:

=> (+ .3 1.7)
CompilerException java.lang.RuntimeException: Unable to resolve symbol: .3 
in this context, compiling:(NO_SOURCE_PATH:1:1) 

So the only way you can do this is if you def'd .3 before

=> (def .3 0.4)
=> (+ .3 1.7)
2.1

On Tuesday, April 9, 2013 10:53:06 AM UTC+2, Cedric Greevey wrote:
>
> This may look mildly surprising, and suggests one more thing *not* to ever 
> do in production code:
>
> user=> (+ .3 1.7)
> 2.1
> user=>
>
> :)
>
> Shouldn't be hard to figure out how to put a repl in a state where that 
> expression will evaluate to that result. I'm sure mathematicians everywhere 
> are deeply offended by the clojure reader now. :)
>
>

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