Exploring Built In Functions: hd
Tail of a list
Length of a list
How to extract the second item of a list
Converting an atom to a string
Converting a string to an atom
From string to an existing [that is, already used] atom
Converting from string to tuples returns a tuple with all the chars
Converting from string to float
metaprogramming with apply: running a function is a module which may be not known at compile time
Reading a line from standard input
Playing with io:format
Adding 1 to each element of a list, using tail recursion