Visual Basic Structure

Visual Basic Syntax

Variables are pre-declared in Visual Basic using As variable_type.

Conditional operators like
       If condition
              ... do something ...
       Else
              ... do some-other-thing ...
       End If
give different options for different conditions.
For instance:

If age > 18
     MsgBox("You are grown-up now.")
Else
     MsgBox("You are still young.")
End If


while loop:
       Do While condition
              ... do something ...
       End Do
and

for loop:
       For i = 0 To a_number Then
              ... do something ...
       Next

The arithmetic operators do exactly what you would expect:
       + means add;
       - means subtract;
       * means multiply;
       / means divide; and
       % means moduli.

' is used for comments.
Comments are just remarks (explanations) you write along side your code for clarity purposes (help you define what you are doing); and also for future remembrance of what a piece of code was meant for.

The compiler neither needs nor processes them.