The Selection Structure The if…then…Else and Select Case Statement Paramet Damchoo , lecturer Business computer Department Management science Faculty Surattani ratjabhat University สสสสสสสสสส สสสสสสสสสส สส มมมมมมมมมมมมมมมมมมมม มมมม
1. The Selection Structure The ifthenElse andSelect Case
Statement Paramet Damchoo , lecturerBusiness computer Department
Management science FacultySurattani ratjabhat University
2. The Selection Structure
You use the selection structure , also called the decision
structure, when you want a program to make a decision or comparison
and then, based on the result of that decision or comparison, to
select one of two paths. You will need to use the selection
structure to complete the Math application.
3. Figure 1-1: Decisions you might need to make today 4. Coding
the Selection Structure in Visual Basic
You usethe if then Else statement to code the selection
structure in Visual Basic. The syntax ofthe IfThenElse statement is
shown in figure 1-2
5. Figure 1-2: Syntax of IfThenElseStatement
IfConditionThen
[instructions when the condition is true]
Else
[instructions when the condition is false]
End If
6. Figure1-3: lists the relational operators you can use in the
IfThen..Else statement s condition Relational Operator Meaning =
Equal to > Greater than >= Greater than orequal to < Less
than=20000 Salary=20000 THEN
