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Undefined values: Difference between revisions
→{{header|Seed7}}
Line 984:
[http://seed7.sourceforge.net/libraries/external_file.htm#open%28in_string,in_string%29 open],
when a file cannot be opened.
=={{header|Smalltalk}}==
In Smalltalk, all variables are automatically initialized to nil. This includes instance variables (an object's private slots), class variables and locals. Thus a variable cannot ever be undefined.
=={{header|Tcl}}==
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