Null object: Difference between revisions

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{{task|Basic language learning}}{{omit from|BBC BASIC}}
{{task|Basic language learning}}'''Null''' (or '''nil''') is the computer science concept of an undefined or unbound object. Some languages have an explicit way to access the null object, and some don't. Some languages distinguish the null object from [[undefined values]], and some don't.
 
Show how to access null in your language by checking to see if an object is equivalent to the null object.
Retrieved from "https://rosettacode.org/wiki/Null_object"