Import another file in Julia

In Julia, you can import functions or other objects from another file by using the include() function or using keyword. Here are examples of both methods:

1.Using include():
Suppose we have a file named my_module.jl with the following function definition:

function greet(name)
    println("Hello, $name!")
end

To import this function in another file, we can use include() as follows:

include("my_module.jl")
greet("John")

The include() function reads the content of my_module.jl and runs it inside the calling program. This adds all the definitions in my_module.jl to the namespace of the calling program.

2.Using using:
Suppose we have a file named my_module.jl with the following module definition:

module MyModule
export greet
function greet(name)

    println("Hello, $name!")

end
end # module

To import this function in another file, we can use the using keyword and import the module:

using .MyModule
greet("John")

This makes the greet() function available in the calling program's namespace under the MyModule module.

Note that in the second example, the . before MyModule tells Julia to look for MyModule in the current module, allowing us to use relative imports.