Codes

Julia

Julia

Installation

Ubuntu

apt install julia

Arch Linux

pacman -S julia

Binary

# Download julia-{version}-{os}-{arch}.tar.gz from https://julialang.org
tar xzf julia-{version}-{os}-{arch}.tar.gz
mv julia-{version} /usr/local
export PATH=/usr/local/julia-{version}/bin:$PATH

git

git clone https://github.com/JuliaLang/julia.git
cd julia
make
mkdir /usr/local/julia-{version}
cp -r usr/* /usr/local/julia-{version}
export PATH=/usr/local/julia-{version}/bin:$PATH

Examples

Fibonacci Numbers

# Fibonacci Numbers
function fib(n)
    if n < 2
        return n
    else
        return fib(n - 2) + fib(n - 1)
    end
end

n = parse(Int32, ARGS[1])
println(fib(n))

#=
example
    julia -O -- fib.jl 39
=#

just the way julia is

# Fibonacci Numbers
fib(n) =  begin
    n < 2 && return n
    fib(n - 2) + fib(n - 1)
end

n = parse(Int32, ARGS[1])
println(fib(n))

#=
example
    julia -O -- fib.jl 39
=#

Matrix form

# Fibonacci Numbers
fib(n) = ([1 1;1 0]^n)[1,2]

n = parse(Int32, ARGS[1])
println(fib(n))

#=
example
    julia -O -- fib_matrix.jl 39
=#

Binet's formula

# Fibonacci Numbers
using Base.MathConstants

fib(n) = floor(Int, φ ^ n / √5 + 0.5)

n = parse(Int32, ARGS[1])
println(fib(n))

#=
example
    julia -O -- fib_binets.jl 39
=#