How to generate independent vectors via for-loop?

General Usage
3

or a vector of vectors

julia> vectors = Vector{Int}[]
       for i in 1:3
           push!(vectors, zeros(i))
       end

julia> vectors
3-element Vector{Vector{Int64}}:
 [0]
 [0, 0]
 [0, 0, 0]

(also I would recommend typing the Dict, if the case Dict{Int,Vector{Int}}(():

julia> d = Dict{Int,Vector{Int}}()
Dict{Int64, Vector{Int64}}()

julia> for i in 1:3
           d[i] = zeros(i)
       end

julia> d
Dict{Int64, Vector{Int64}} with 3 entries:
  2 => [0, 0]
  3 => [0, 0, 0]
  1 => [0]
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