Three dogs (Are there three dogs or one dog?) is a code snippet used to illustrate the lettercase sensitivity of the programming language. For a case-sensitive language, the identifiers dog, Dog and DOG are all different and we should get the output:

The three dogs are named Benjamin, Samba and Bernie.

For a language that is lettercase insensitive, we get the following output:

There is just one dog named Bernie.



Related task

 Unicode variable names


 
-module( case_sensitivity_of_identifiers ).
 
-export( [task/0] ).
 
task() ->
	catch dog = "Benjamin", % Function will crash without catch
	Dog = "Samba",
	DOG = "Bernie",
	io:fwrite( "The three dogs are named ~s, ~s and ~s~n", [dog, Dog, DOG] ).
 