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-rw-r--r--visualbasic.html.markdown123
1 files changed, 62 insertions, 61 deletions
diff --git a/visualbasic.html.markdown b/visualbasic.html.markdown
index bdfdcc10..0371e6f6 100644
--- a/visualbasic.html.markdown
+++ b/visualbasic.html.markdown
@@ -9,13 +9,13 @@ filename: learnvisualbasic.vb
Module Module1
Sub Main()
- ' A Quick Overview of Visual Basic Console Applications before we dive
- ' in to the deep end.
- ' Apostrophe starts comments.
- ' To Navigate this tutorial within the Visual Basic Complier, I've put
- ' together a navigation system.
- ' This navigation system is explained however as we go deeper into this
- ' tutorial, you'll understand what it all means.
+ 'A Quick Overview of Visual Basic Console Applications before we dive
+ 'in to the deep end.
+ 'Apostrophe starts comments.
+ 'To Navigate this tutorial within the Visual Basic Complier, I've put
+ 'together a navigation system.
+ 'This navigation system is explained however as we go deeper into this
+ 'tutorial, you'll understand what it all means.
Console.Title = ("Learn X in Y Minutes")
Console.WriteLine("NAVIGATION") 'Display
Console.WriteLine("")
@@ -32,6 +32,9 @@ Module Module1
Console.WriteLine("50. About")
Console.WriteLine("Please Choose A Number From The Above List")
Dim selection As String = Console.ReadLine
+ 'The "Case" in the Select statement is optional.
+ 'For example, "Select selection" instead of "Select Case selection"
+ 'will also work.
Select Case selection
Case "1" 'HelloWorld Output
Console.Clear() 'Clears the application and opens the private sub
@@ -42,10 +45,10 @@ Module Module1
Case "3" 'Calculating Whole Numbers
Console.Clear()
CalculatingWholeNumbers()
- Case "4" 'Calculting Decimal Numbers
+ Case "4" 'Calculating Decimal Numbers
Console.Clear()
CalculatingDecimalNumbers()
- Case "5" 'Working Calcculator
+ Case "5" 'Working Calculator
Console.Clear()
WorkingCalculator()
Case "6" 'Using Do While Loops
@@ -74,10 +77,10 @@ Module Module1
'One - I'm using numbers to help with the above navigation when I come back
'later to build it.
- 'We use private subs to seperate different sections of the program.
+ 'We use private subs to separate different sections of the program.
Private Sub HelloWorldOutput()
'Title of Console Application
- Console.Title = "Hello World Ouput | Learn X in Y Minutes"
+ Console.Title = "Hello World Output | Learn X in Y Minutes"
'Use Console.Write("") or Console.WriteLine("") to print outputs.
'Followed by Console.Read() alternatively Console.Readline()
'Console.ReadLine() prints the output to the console.
@@ -88,18 +91,18 @@ Module Module1
'Two
Private Sub HelloWorldInput()
Console.Title = "Hello World YourName | Learn X in Y Minutes"
- ' Variables
- ' Data entered by a user needs to be stored.
- ' Variables also start with a Dim and end with an As VariableType.
+ 'Variables
+ 'Data entered by a user needs to be stored.
+ 'Variables also start with a Dim and end with an As VariableType.
- ' In this tutorial, we want to know what your name, and make the program
- ' respond to what is said.
+ 'In this tutorial, we want to know what your name, and make the program
+ 'respond to what is said.
Dim username As String
'We use string as string is a text based variable.
Console.WriteLine("Hello, What is your name? ") 'Ask the user their name.
username = Console.ReadLine() 'Stores the users name.
Console.WriteLine("Hello " + username) 'Output is Hello 'Their name'
- Console.ReadLine() 'Outsputs the above.
+ Console.ReadLine() 'Outputs the above.
'The above will ask you a question followed by printing your answer.
'Other variables include Integer and we use Integer for whole numbers.
End Sub
@@ -107,7 +110,7 @@ Module Module1
'Three
Private Sub CalculatingWholeNumbers()
Console.Title = "Calculating Whole Numbers | Learn X in Y Minutes"
- Console.Write("First number: ") 'Enter a whole number, 1, 2, 50, 104 ect
+ Console.Write("First number: ") 'Enter a whole number, 1, 2, 50, 104, etc
Dim a As Integer = Console.ReadLine()
Console.Write("Second number: ") 'Enter second whole number.
Dim b As Integer = Console.ReadLine()
@@ -123,10 +126,10 @@ Module Module1
'Of course we would like to be able to add up decimals.
'Therefore we could change the above from Integer to Double.
- 'Enter a whole number, 1.2, 2.4, 50.1, 104.9 ect
+ 'Enter a floating-point number, 1.2, 2.4, 50.1, 104.9, etc
Console.Write("First number: ")
Dim a As Double = Console.ReadLine
- Console.Write("Second number: ") 'Enter second whole number.
+ Console.Write("Second number: ") 'Enter second floating-point number.
Dim b As Double = Console.ReadLine
Dim c As Double = a + b
Console.WriteLine(c)
@@ -142,15 +145,15 @@ Module Module1
'Copy and paste the above again.
Console.Write("First number: ")
Dim a As Double = Console.ReadLine
- Console.Write("Second number: ") 'Enter second whole number.
- Dim b As Integer = Console.ReadLine
- Dim c As Integer = a + b
- Dim d As Integer = a * b
- Dim e As Integer = a - b
- Dim f As Integer = a / b
+ Console.Write("Second number: ") 'Enter second floating-point number.
+ Dim b As Double = Console.ReadLine
+ Dim c As Double = a + b
+ Dim d As Double = a * b
+ Dim e As Double = a - b
+ Dim f As Double = a / b
'By adding the below lines we are able to calculate the subtract,
- 'multply as well as divide the a and b values
+ 'multiply as well as divide the a and b values
Console.Write(a.ToString() + " + " + b.ToString())
'We want to pad the answers to the left by 3 spaces.
Console.WriteLine(" = " + c.ToString.PadLeft(3))
@@ -176,11 +179,11 @@ Module Module1
Console.Write("First number: ")
Dim a As Double = Console.ReadLine
Console.Write("Second number: ")
- Dim b As Integer = Console.ReadLine
- Dim c As Integer = a + b
- Dim d As Integer = a * b
- Dim e As Integer = a - b
- Dim f As Integer = a / b
+ Dim b As Double = Console.ReadLine
+ Dim c As Double = a + b
+ Dim d As Double = a * b
+ Dim e As Double = a - b
+ Dim f As Double = a / b
Console.Write(a.ToString() + " + " + b.ToString())
Console.WriteLine(" = " + c.ToString.PadLeft(3))
@@ -193,10 +196,10 @@ Module Module1
Console.ReadLine()
'Ask the question, does the user wish to continue? Unfortunately it
'is case sensitive.
- Console.Write("Would you like to continue? (yes / no)")
+ Console.Write("Would you like to continue? (yes / no) ")
'The program grabs the variable and prints and starts again.
answer = Console.ReadLine
- 'The command for the variable to work would be in this case "yes"
+ 'The command for the variable to work would be in this case "yes"
Loop While answer = "yes"
End Sub
@@ -208,7 +211,7 @@ Module Module1
Console.Title = "Using For Loops | Learn X in Y Minutes"
'Declare Variable and what number it should count down in Step -1,
- 'Step -2, Step -3 ect.
+ 'Step -2, Step -3, etc.
For i As Integer = 10 To 0 Step -1
Console.WriteLine(i.ToString) 'Print the value of the counter
Next i 'Calculate new value
@@ -219,7 +222,7 @@ Module Module1
'Eight
Private Sub ConditionalStatement()
Console.Title = "Conditional Statements | Learn X in Y Minutes"
- Dim userName As String = Console.ReadLine
+ Dim userName As String
Console.WriteLine("Hello, What is your name? ") 'Ask the user their name.
userName = Console.ReadLine() 'Stores the users name.
If userName = "Adam" Then
@@ -235,36 +238,34 @@ Module Module1
'Nine
Private Sub IfElseStatement()
- Console.Title = "If / Else Statement | Learn X in Y Minutes"
+ Console.Title = "If / Else Statement | Learn X in Y Minutes"
'Sometimes it is important to consider more than two alternatives.
'Sometimes there are a good few others.
'When this is the case, more than one if statement would be required.
'An if statement is great for vending machines. Where the user enters a code.
- 'A1, A2, A3, ect to select an item.
- 'All choices can be combined into a single if statement.
+ 'A1, A2, A3, etc to select an item.
+ 'All choices can be combined into a single if block.
- Dim selection As String = Console.ReadLine 'Value for selection
- Console.WriteLine("A1. for 7Up")
- Console.WriteLine("A2. for Fanta")
- Console.WriteLine("A3. for Dr. Pepper")
- Console.WriteLine("A4. for Diet Coke")
- Console.ReadLine()
- If selection = "A1" Then
- Console.WriteLine("7up")
- Console.ReadLine()
- ElseIf selection = "A2" Then
- Console.WriteLine("fanta")
- Console.ReadLine()
- ElseIf selection = "A3" Then
- Console.WriteLine("dr. pepper")
- Console.ReadLine()
- ElseIf selection = "A4" Then
- Console.WriteLine("diet coke")
- Console.ReadLine()
- Else
- Console.WriteLine("Please select a product")
- Console.ReadLine()
- End If
+ Dim selection As String 'Declare a variable for selection
+ Console.WriteLine("Please select a product form our lovely vending machine.")
+ Console.WriteLine("A1. for 7Up")
+ Console.WriteLine("A2. for Fanta")
+ Console.WriteLine("A3. for Dr. Pepper")
+ Console.WriteLine("A4. for Diet Coke")
+
+ selection = Console.ReadLine() 'Store a selection from the user
+ If selection = "A1" Then
+ Console.WriteLine("7up")
+ ElseIf selection = "A2" Then
+ Console.WriteLine("fanta")
+ ElseIf selection = "A3" Then
+ Console.WriteLine("dr. pepper")
+ ElseIf selection = "A4" Then
+ Console.WriteLine("diet coke")
+ Else
+ Console.WriteLine("Sorry, I don't have any " + selection)
+ End If
+ Console.ReadLine()
End Sub