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- <h1>Null</h1>
- <h1>Parameters</h1>
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- None
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- <h1>Description</h1>
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- Designates a Null Type object. Useful for making a Type variable point to nothing or checking if a Type object exists. Also, useful for checking that there are still objects left on the end of a Type list using the After command.
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- Can used for testing and setting.
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- See also: <a class=small href=Type.htm>Type</a>, <a class=small href=New.htm>New</a>, <a class=small href=Delete.htm>Delete</a>, <a class=small href=After.htm>After</a>, <a class=small href=Before.htm>Before</a>, <a class=small href=First.htm>First</a>, <a class=small href=Last.htm>Last</a>.
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- <h1><a href=../2d_examples/Null.bb>Example</a></h1>
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- ; Null example
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- Type Alien
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- Field x,y
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- End Type
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- a.Alien = New Alien
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- If a <> Null Then Print "Alien exists!"
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- Delete a
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- if a = Null Then Print "Alien gone!"
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