Enumerations: Difference between revisions
Added Wren
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cherry = 2
End Enum</lang>
=={{header|Wren}}==
Wren doesn't support either enums or constants as such but a common way to indicate that a variable should not be mutated is to give it an upper case name and to group related variables together.
The only way to give such a variable a value without setting it explicitly is to add one to the previous such variable which (in effect) is what a C-style enum does. If you declare a variable in Wren without giving it a value, then it is set to the special value ''null'' which is no help here.
<lang ecmascript>var APPLE = 1
var ORANGE = 2
var PEAR = 3
var CHERRY = 4
var BANANA = CHERRY + 1
var GRAPE = BANANA + 1
System.print([APPLE, ORANGE, PEAR, CHERRY, BANANA, GRAPE])</lang>
{{out}}
<pre>
[1, 2, 3, 4, 5, 6]
</pre>
=={{header|XPL0}}==
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