Set is a concept rather than a specific data
type. It is a facet of any data value and virtually anything can be used as a set.
For two values x and s,
if any of the expressions x in s, x (- s, s(x), or s*x
evaluates to true (non-zero), then we consider that x to be a member of the set
s. There several ways to create and use a set.
Subsections
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2009-12-22