Lesson 5, Introduction to Control Structures
Part 1

We have previously seen how we can make a decision. We simply using the If...then...Else decision structure. Now we want to take it one step further and discuss how we make more than one decision in our program. We call this decision structure a Nested If....then....Else.

Suppose we were asked to create the following program:

At a school they want a computer program that will evaluate a student's hand orientation and if it is in the "raised" position they can get called upon to answer a question. If their answer is "correct" then they are praised. If they are not "correct" then they will be thanked for their effort.

First Let's do the problem statement for this:
Assumptions
Input
Calculations
Output
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Problem Statement
Assumptions:
1. A raised hand will allow a student to answer a question
2. A students hand can only be "raised" or not.
3. A student's answer can only be "correct" or not

Input:
1. A Student's hand Orientation
2. Whether a student is correct or incorrect

Calculations
None

Output:
1. If a student's hand is raised and then answer correctly then "Thank you for the correct answer"
2. If a student's hand is raised and then answer incorrectly then "Thank you for trying"
Now write the human Algorithm

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Human Algorithm:
1. Input the student's hand orientation
2. If the student's hand is "raised" then Input whether the student's is correct or incorrect
3. If the student's answer is "correct" then output "Thank you for the correct answer"
4. If the student's answer is something else then output "Thank you for trying
Now Create the flowchart

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Flow Chart:

Now Create the VB Script

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VB Script Code:

<Script language ="vbscript">
DIM HandOrientation, Answer

HandOrientation = Inputbox("What is the hand Orientation")

If HandOrientation = "Raised" then
    Answer = Inputbox("What is your evaluation of the answer?")

         If Answer = "Correct" Then           '<-- Notice how I indented. Indenting nested if..then..else code made it easier to understand
             Document.write "Thank you for the correct answer"
        Else
             Document.write "Thank you for trying!"
    End If

End If
</Script>

Lesson 5, Introduction to Control Structures Part 1

Lesson 5, Introduction to Control Structures
Part 1