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Tabular form or roster form

In this method of describing a set, the elements of the set which are listed separated by commas within brackets.
 
For example, the set of all odd positive integers less than 10 can be described as {1, 3, 5, 7, 9}.

Property method or set-builder form

In this method of describing a set, a variable x which stands for each element of the set is written under braces and then after giving a semicolon; or oblique line the property or properties p(x), possessed by each element of the set is written within the braces itself.
 
Example
  1. The set A = [1, 3, 5} can be written as A = {x /x ∈ N, x is an odd number x < 5}.
  2. The set A of all even natural numbers can be described as A = {2n ; n  N}.




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