Null object: Difference between revisions
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→{{header|R}}: Added REBOL example. |
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foo <- function(){} # function that does nothing |
foo <- function(){} # function that does nothing |
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foo() # returns NULL</lang> |
foo() # returns NULL</lang> |
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=={{header|REBOL}}== |
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<lang REBOL>x: none |
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print either none? x ["x is none."]["x is not none."]</lang> |
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Output: |
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<pre>x is none.</pre> |
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=={{header|Ruby}}== |
=={{header|Ruby}}== |
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