[julia-users] let block question

[feza]

Is there any difference between

version1:

let x
x = 0
end


vs.

version2:

let 
local x = 0
end


vs

version3:
let x = 0
end



version 1 and 2 

; Function Attrs: uwtable             
define i64 @julia_t2_67462() #0 {     
top:                                  
  ret i64 0                           
}                                     

version 3

; Function Attrs: uwtable
define void @julia_t3_67453() #0 {
top:
  ret void
}



looking at @code_llvm it seems like    version1 and version2 are identical 
and version3 is almost identical except for the fact that it returns a void.

Also is there  a good reference for understanding the output of code_llvm?