Interactive Elixir Shell¶
Learn how to interact with the interactive shell and get started.
To enter the interactive shell open your terminal and type the following
For mac, freeBSD or linux -
$ iex iex(1)>
For windows -
c:\> iex.bat iex(1)>
Interactive shell provides a convenience method for using elixir. Let's try to explore it.
iex(1)> IO.puts("Hello, World")
You get back a response -
Hello, World :ok
Don't worry about
:ok, its called as an
atom and we will come back to it later. To exit the IEx press
IEx provides all sorts of helper function, we will see them as required in future tutorials, for now again open the IEx and type the following -
What output do you see?
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Term 43 Data type Integer Reference modules Integer Implemented protocols IEx.Info, Inspect, List.Chars, String.Chars
Using the flag
i the interactive shell provided you with a lot of data, lets try putting something else this time.
iex(2)> i "Hello, World"
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Term "Hello, World" Data type BitString Byte size 12 Description This is a string: a UTF-8 encoded binary. It's printed surrounded by "double quotes" because all UTF-8 encoded code points in it are printable. Raw representation <<72, 101, 108, 108, 111, 44, 32, 87, 111, 114, 108, 100>> Reference modules String, :binary Implemented protocols Collectable, IEx.Info, Inspect, List.Chars, String.Chars
Data type is showing
BitString this time, earlier for
43 the data type was
Integer, IEx is trying to help by providing all the information that it available.
Now, its time for some fun exercises, type the following and see what output do you get
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iex(1)> i 'a' iex(2)> i 2.56 iex(3)> i :hello iex(4)> i true
Just read all the outputs, you are not required to understand everything just yet, but try to read and make sense of the output.