VBScript Conditional Statements, VBScript Language Fundamentals, VBScript Control Flow, VBScript If Statement, and ‘Select Case’ statement.
VBScript Conditional Statements
1. Execute a Statement when the condition is True.
Syntax:
If Condition Then Statement
Example:
Dim myDate
myDate = #10/10/2010#
If myDate < Date Then myDate = Date
Msgbox myDate
myDate = #10/10/2017#
If myDate < Date Then myDate = Date
Msgbox myDate
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ii) Execute a Block of statements when the condition is True.
Syntax:
If Condition Then
Statements
————
———–
————
End If
Example:
Dim a, b
a = 100
b = 900
If a > b Then
Msgbox “A is a Big Number”
End If
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iii) Execute a Block of statements when the condition is True, otherwise execute another block of statements.
Syntax:
If Condition Then
Statements
———–
———–
———–
Else
Statements
———–
———–
———–
End If
Examples:
———–
Dim a, b
a = 100
b = 900
If a > b Then
Msgbox “A is a Big Number”
Else
Msgbox “B is a Big Number”
End If
——————
Dim a, b
a = InputBox(“Enter A Value”)
b = InputBox(“Enter B Value”)
If Cint (a) > Cint (b) Then
Msgbox “A is a Big Number”
Else
Msgbox “B is a Big Number”
End If
——————————-
Dim a, b
a = InputBox(“Enter A Value”)
b = InputBox(“Enter B Value”)
If ISNumeric(a) = True And IsNumeric(b) = True Then
If Cint (a) > Cint (b) Then
Msgbox “A is a Big Number”
Else
Msgbox “B is a Big Number”
End If
Else
Msgbox “Invalid Input”
End If
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iv) Decide among several alternates (Else If)
Syntax:
If Condition then
Statements
————-
————
———-
ElseIf Condition Then
Statements
————-
————
———-
ElseIf Condition Then
Statements
————-
————
———-
ElseIf Condition Then
Statements
————-
————
———-
Else
Statements
————-
————
———-
End If
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Example:
‘Read a Value and Verify the Range
‘If the value is in between 1 and 100 then display “Value is a Small Number”
‘If the value is in between 101 and 1000 then display “Value is a Medium Number”
‘If the value is in between 1001 and 10000 then display “Value is a Big Number”
‘If the value is more than 10000 then display “Value is High Number”
‘Otherwise display “value is either Zero or Negative value.
‘———————————————————————
Dim val
val = InputBox(“Enter a Value”)
If IsNumeric(val) Then
If val >= 1 And val <=100 Then
Msgbox “Value is Small Number”
ElseIf val > 100 And val <= 1000 Then
Msgbox “Value is a Medium Number”
ElseIf val > 1000 And val <= 10000 Then
Msgbox “Value is a Big Number”
ElseIf val > 10000 Then
Msgbox “Value is High Number”
Else
Msgbox “value is either Zero or Negative Value”
End If
Else
msgbox “Invalid Input”
End If
v) Execute a block of statements when more than one condition is True
Syntax:
If Condition Then
If Condition Then
If Condition Then
Statements
———
———–
Else
———-
———
End If
End If
End If
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Example:
‘Read a Value and verify whether the Value is Valid Mobile Number or not?
‘Value should be Numeric
‘Value must contain 10 digits
‘First letter should be either 9 or 8
‘———————————————–
Dim val
val = InputBox (“Enter a Value”)
If IsNumeric(val) = True Then
If Len(val) = 10 Then
If Left(val, 1) = 9 Or Left(val, 1) = 8 Then
Msgbox “val is a Valid Mobile Number”
Else
Msgbox “Val is Invalid Mobile Number”
End If
Else
Msgbox “It is not a 10 digit value”
End If
Else
Msgbox “It is not a Numeric Value”
End If
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‘Handle . Symbol
———————————————-
vi) Decide among several alternates (using Select Case)
Syntax:
Select Case TestExpression
Case “Case1Name”
Statements
———-
———-
Case “Case2Name”
Statements
———-
———-
Case “Case3Name”
Statements
———-
———-
Case Else
Statements
———-
——–
———-
End select
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Example:
Dim a, b, operation
a = 10
b = 20
operation = LCase (InputBox(“Enter a value”))
Select Case operation
Case “add”
Msgbox “Addition of a, b is: “& a+b
Case “sub”
Msgbox “Subtraction of a, b is: “& a-b
Case “mul”
Msgbox “Multiplication of a, b is: “& a*b
Case “div”
Msgbox “Division of a, b is: “& a/b
Case Else
msgbox “Invalid Operation”
End Select
