Learning Julia

User-defined and composite data types

Until now, we have been dealing with the data types that were available to a user and provided by Julia. Now we will be exploring ways to use types that are not made available to us by Julia, and we need to create them in order to address the problems we are dealing or intend to deal with.

The most important keyword that we need to create a user-defined data type is called an type. The following is an example of how to create a simple data type in Julia:

julia> type Person
                  name::String
                  age::Int64
              end

julia> rahul = Person("rahul",27)
Person("rahul",27)

julia> typeof(rahul)
Person

julia> rahul.name
"rahul"

julia> rahul.age
27

This example is one of the simplest examples of what we can consider a user-defined ...