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Chapter 3: Problem 9

What statement do you use in Python to write a dual alternative decision structure?

Short Answer

Expert verified
Answer: A dual alternative decision structure is a control structure in programming that allows choosing between two different blocks of code depending on whether a certain condition is true or false. In Python, it is implemented using 'if' and 'else' keywords, with the following pattern: ```python if condition: # Code block executed when the condition is true else: # Code block executed when the condition is false ```

Step by step solution

01

Understanding Dual Alternative Decision Structures

A dual alternative decision structure is a control structure in programming languages that allows choosing between two different blocks of code depending on whether a certain condition is true or false. It helps in making decisions in the program based on the conditions provided.
02

Implementing Dual Alternative Decision Structures in Python

In Python, the dual alternative decision structure is implemented using 'if' and 'else' keywords. The structure follows this pattern: ```python if condition: # Code block executed when the condition is true else: # Code block executed when the condition is false ```
03

Example of a Dual Alternative Decision Structure in Python

Here is an example of a dual alternative decision structure in Python that checks if a number is even or odd: ```python number = 7 if number % 2 == 0: print("The number is even.") else: print("The number is odd.") ``` In this example, if the remainder when `number` is divided by 2 is 0 (meaning the number is even), it will print "The number is even.", Otherwise, it will print "The number is odd."

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