Notes for Slide 04
To begin the specification of a choice, use an if-statement.
An if-statement is the word if followed by an
open-paren: ( :followed by a condition
followed by a close paren: ) :followed by an
open curly brace: { :.
1, 2, 3, [4 (top)], 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, [Lab]