Julia - Before Dataframes

Text output to console

println("Hello Julia")

In Julia, Strings are denoted by double quotation marks (“text”)

language = "Julia"
println("Hello, ", language)

Strings are immutable. Hence, this does not work:

language[1] = "C"

Common workaround for immutable Strings: New string composed of parts of old string

In Julia, “String concatenation is done with * in Julia, not + like in Python.” (docs.julialang.org)

stringConcat = "Language: " * language[1:end]
println(stringConcat)

Implicit type definition by representative + Type conversion

n = 5
x = 7.7
y = n * x
myInt = convert(Int64, round(y, digits=0))
println(myInt)
println(typeof(language), typeof(n), typeof(y), typeof(myInt))

Julia starts with 1 Python needs indent, Julia needs an ‘end’

for i in 1:4
if i > 1
println("Stop")
break
end
println("Hello, Number $i")
end

In Julia, you define a function as a function

function addOne(x)
    return x + 1
end
println(addOne(5)) # 6