$ is used for expression interpolation (see metaprogramming in the manual), so you need the parens to make it clear that you're not trying to do interpolation.
On Wednesday, October 7, 2015, cheng wang <[email protected]> wrote: > Thanks. Still, why + and $ are different in this case ? > > On Wednesday, October 7, 2015 at 9:05:10 PM UTC+2, Seth wrote: >> >> Surround it by parens: >> >> julia> ($)(x::Int, y::Int) = x+y+5 >> ... >> julia> ($)(5,7) >> 17 >> >> On Wednesday, October 7, 2015 at 11:39:03 AM UTC-7, cheng wang wrote: >>> >>> Hello everyone, >>> >>> I try to do $(x,y)=something, it says: syntax: invalid assignment >>> location >>> while +(x,y)=something is ok. >>> >>> Is there any speciality of $ operator? >>> >>> Best, >>> Cheng >>> >>
