Chapter 1 - Sections 1.2-1.3 - Integrated Review - Algebraic Expressions and Operations on Whole Numbers - Page 29: 15

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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.