I am not sure if this is what you are looking for:

xini = 0.0
xend = 10.0
res = [xini]
x = xini
while x < xend
    x = nextfloat(x)
    push!(res,x)
end

This will generate a quite large `res` vector...

Regarding intervals, together with David Sanders we have been working on 
ValidatedNumerics.jl, which you may find useful.

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