Idiomatically determine all the lowercase and uppercase letters: Difference between revisions

Added Arturo implementation
(Added Arturo implementation)
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upper: "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
</pre>
 
=={{header|Arturo}}==
 
<lang rebol>print ["lowercase letters:" `a`..`z`]
print ["uppercase letters:" `A`..`Z`]</lang>
 
{{out}}
 
<pre>lowercase letters: [a b c d e f g h i j k l m n o p q r s t u v w x y z]
uppercase letters: [A B C D E F G H I J K L M N O P Q R S T U V W X Y Z]</pre>
 
=={{header|AWK}}==
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