39 lines
1.3 KiB
Plaintext
39 lines
1.3 KiB
Plaintext
julia> "Inspired by Python's `input` function."
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function input(prompt::AbstractString="")
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print(prompt)
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chomp(readline())
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end
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input (generic function with 2 methods)
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julia> n = parse(Int, input("Upper bound for dimension 1: ")) # parse as `Int`
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Upper bound for dimension 1: 5
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5
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julia> m = parse(Int, input("Upper bound for dimension 2: "))
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Upper bound for dimension 2: 5
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5
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julia> x = rand(n, m) # create an n·m random matrix
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5x5 Array{Float64,2}:
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0.80217 0.422318 0.594049 0.45547 0.208822
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0.0533981 0.304858 0.0276755 0.797732 0.828796
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0.522506 0.563856 0.216759 0.865961 0.034306
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0.792363 0.815744 0.868697 0.42509 0.588946
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0.112034 0.539611 0.674581 0.508299 0.939373
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julia> x[3, 3] # overloads `getindex` generic function
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0.21675944652281487
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julia> x[3, 3] = 5 # overloads `setindex!` generic function
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5
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julia> x::Matirx # `Matrix{T}` is an alias for `Array{T, 2}`
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5x5 Array{Float64,2}:
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0.80217 0.422318 0.594049 0.45547 0.208822
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0.0533981 0.304858 0.0276755 0.797732 0.828796
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0.522506 0.563856 5.0 0.865961 0.034306
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0.792363 0.815744 0.868697 0.42509 0.588946
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0.112034 0.539611 0.674581 0.508299 0.939373
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julia> x = 0; gc() # Julia has no `del` command, rebind `x` and call the garbage collector
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