Statement

• A semicolon at the end of a code can be omitted (usually omitted) if it does not cause syntax ambiguity
• A function can either return a value or not return a value,for example

let abc = function (a: number)
    if a > 0 then
        return
    else
        return 1
    end
end

• -- The rest of the lines that are attached to the minus sign are the comments
• --[[ and ]] The multi-line text in the middle is also comments