Initialize Arrays from Ranges, Semicolon explanation

[Tamas_Papp]

You should read the docs, and this discussion:

How to create a 2x1 Array?

It was discussed in the lead up to 1.0 whether [1; 2; 3] should construct a vector or a matrix. But note that there’s nothing special about two dimensions in concatenation syntax in general: julia> [rand(2); rand(2)] 4-element Array{Float64,1}: 0.528860561644692 0.2992626181507161 0.6659761151342882 0.423705081212141 julia> [rand(2, 2, 2); rand(2, 2, 2)] 4×2×2 Array{Float64,3}: [:, :, 1] = 0.91018 0.0499205 0.136608 0.128014 0.621301 0.0150574 0.58328 0.694085 [:, :, 2] = 0.533…

That said, it is very likely that you want to use 1:10 as is (without allocating an array), or if you want to modify values, collect(1:10).