#### Answer

0

#### Work Step by Step

The set of whole numbers consists of all integers that are greater than or equal to 0 in value. We can write the whole numbers in set builder notation as {0,1,2,3...}.
The set of natural numbers consists of all positive integers, or all whole numbers that are greater than 0 in value. We can write the natural numbers in set builder notation as {1,2,3,4...}.
Since the set of natural numbers only consists of positive integers, 0 is the only number that is a whole number and not a natural integer.