Ranges come in handy when you have to work with an interval of numbers, for example, one up to thousand: 1:1000. The type of this object, typeof(1:1000), is UnitRange{Int64}. By default, the step is 1, but this can also be specified as the second number; 0:5:100 gives all multiples of 5 up to 100. You can iterate over a range, as follows:
# code from file chapter2\arrays.jl
for i in 1:2:9
println(i)
end
This prints out 1, 3, 5, 7, 9 on consecutive lines.
In the previous section on Strings, we already encountered the array type when discussing the split function:
a = split("A,B,C,D",",")
typeof(a) #> Array{SubString{String},1}
show(a) #> SubString{String}["A","B","C","D"]
Julia's arrays are very efficient, powerful, and ...
