IfIf ThenIf Then Else Decision Structures

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IfIf ThenIf Then ElseDecision Structures

• Molloy College
• Mathematics and Computer Science
• Dr. Cohen

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If
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If What does if mean? At a certain
time Under certain conditions When certain
conditions are met Not always
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Usually If means a Boolean outcome Are
conditions met? Yes, then do one thing. No, then
do another thing.
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If intSecret 24 Then lblMessage.captionYou
guessed the secret. End if If intSecret 20
Then lblMessage.captionWrong! Try again. End
if
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• Your book lists Boolean relational operators
• equal to
• lt less than
• lt less than or equal to
• gt greater than
• gt greater than or equal to
• ltgt unequal to

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If Then statements can handle more than one
line If intSecret 24 Then lblMessage.captionY
ou are right! lblMessage.fontsize24 lblMessage.f
ontArial End if
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As an alternative use Else If intSecret24
Then lblMessage.captionVery good! Else lblMessa
ge.captionSorry. Try again. End if
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Message Boxes
Message Boxes are used frequently with decision
structures. Youve seen message boxes almost
every time you access the Internet.
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(No Transcript)
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To create a Message Box, use this simple formula
MsgBoxMsg MsgBoxPut in the message you want.
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Generating Random Numbers
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With random numbers we can simulate changing
values.