julia> a = rand(3, 3)
3×3 Matrix{Float64}:
0.893835 0.365916 0.921844
0.971955 0.0643828 0.63403
0.149759 0.247479 0.0915574
julia> zeros(size(a))
3×3 Matrix{Float64}:
0.0 0.0 0.0
0.0 0.0 0.0
0.0 0.0 0.0
julia> zeros(Int, size(a))
3×3 Matrix{Int64}:
0 0 0
0 0 0
0 0 0
