Chapter 4: Problem 18

How do you write a multiple alternative decision structure in pseudocode?

Short Answer

Expert verified

Answer: The output will be "Average".

Step by step solution

Define the problem

First, it's important to understand the problem that requires a multiple alternative decision structure. Let's consider a problem where the user must input a grade, and the program must output whether the grade is excellent, good, average, or poor.

Begin pseudocode with user input

Start the pseudocode by asking the user to input the grade and store it in a variable called "grade": ``` READ grade ```

Write the first conditional statement

Begin the multiple alternative decision structure with an 'if' statement to check if the grade is excellent, i.e., greater than or equal to 90: ``` IF grade >= 90 THEN OUTPUT "Excellent" ```

Use 'else if' for further conditions

Write 'else if' statements to check for other conditions, like if the grade is good, average, or poor. For example, if the grade is between 80 and 89, the output should be "Good": ``` ELSE IF grade >= 80 THEN OUTPUT "Good" ```

Continue with 'else if' for additional conditions

Add more 'else if' statements for the other conditions, for example for a grade between 70 and 79, the output should be "Average": ``` ELSE IF grade >= 70 THEN OUTPUT "Average" ```

Use 'else' for the last condition

For the last condition, use an 'else' statement when none of the previous conditions are met. In this case, a grade less than 70, the output should be "Poor": ``` ELSE OUTPUT "Poor" ```

End the decision structure

Lastly, close the multiple alternative decision structure using 'END IF': ``` END IF ```

Final pseudocode

Here is the complete pseudocode for a multiple alternative decision structure that evaluates a grade input: ``` READ grade IF grade >= 90 THEN OUTPUT "Excellent" ELSE IF grade >= 80 THEN OUTPUT "Good" ELSE IF grade >= 70 THEN OUTPUT "Average" ELSE OUTPUT "Poor" END IF ```

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How do you write a multiple alternative decision structure in pseudocode?

Short Answer

Step by step solution

Define the problem

Begin pseudocode with user input

Write the first conditional statement

Use 'else if' for further conditions

Continue with 'else if' for additional conditions

Use 'else' for the last condition

End the decision structure

Final pseudocode

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