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Creating an Icon table

The Icon function ``table()'' creates a new table.

• ``table()'' with no arguments creates an empty table.
• ``table(x)'' creates a table in which all entries are assumed to have value x until otherwise defined.

With the first form shown above, a reference to an element that has never been defined causes an error. If a table created with the second form, and then you refer to an element that has never been defined, you will get value x.

For example, this code

    phoneTable  :=  table();

    totalsTable  :=  table ( 0 );