
Explanation of Solution
a.
Given code:
'if the condition is true
If intX > 100
'Set the result
lblResult.Text = "Invalid Data"
'End the statement
End If
Error in the statement:
The “Then” keyword is missing in the “If” statement...
Explanation of Solution
b.
Given code:
'Create a variable "str" and set the value
Dim str As String = "Hello"
'Create an integer variable "intLength"
Dim intLength As Integer
'set the value of "intLength" as the length of "str"
intLength = Length(str)
Error in the statement:
The last statement should read “intLength = str.Length”...
Explanation of Solution
c.
Given code:
'if the condition is true
If intZ < 10 Then
'set the value of result
lblResult.Text = "Invalid Data"
Error in the statement:
The “End If” statement is missing in the above snippet.
Corrected statement:
'if the condition is true
If intZ < 10 Then
Explanation of Solution
d.
Given code:
'Create a variable "str" and set the value
Dim str As String = "123"
'if the condition is true
If str.IsNumeric Then
'set the result
lblResult.Text = "It is a number."
'end if condition
End If
Error in the statement:
The If statement should read: “If IsNumeric(str) Then”
Corrected statement:
'Create a variable "str" and set the value
Dim str As String = "123"
'if the condition is true
If IsNumeric(str) Then
'set the result
lblResult...
Explanation of Solution
Given code:
'start select case
Select Case intX
'case 1
Case < 0
'set the result
lblResult. Text = “Value too low”
'case 2
Case > 100
'set the result
lblResult. Text = “Value too high”
'else case
Case Else
'set the result
lblResult. Text =”Value just right”
'end select
End Select
Explanation:
The above code snippet is used to execute select statements. In the code,
- Start a select case
- Case 1 “<0”
- Set the result as “Value too low”
- Case 2 “>100”
- Set the result as “Value too high”
- Else Case
- Set the result as “Value just right”
- Case 1 “<0”
- End select statement.
Error in the statement:
The “Is” keyword is missing in the “Select Case” statements...

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Chapter 4 Solutions
Starting Out With Visual Basic (8th Edition)
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