The example demonstrates creation of an array and displays it's elements.
Test for equality using the equal? method
The scope in which a symbol is declared does not affect its uniqueness.
A method might contain code to test the value of the incoming argument
The ‘meaning’ of the symbol changes according to its scope.
The variables $f1, $f2 and $f3 are assigned the symbol :Fred in three different scopes: module One, module Two and the ‘main’ scope.