Example
A comment is marked by an apostrophe ('), and ignored when the code executes. Comments help explain your code to future readers, including yourself.
Since all lines starting with a comment are ignored, they can also be used to prevent code from executing (while you debug or refactor). Placing an apostrophe ' before your code turns it into a comment. (This is called commenting out the line.)
Sub InlineDocumentation()
'Comments start with an "'"
'They can be place before a line of code, which prevents the line from executing
'Debug.Print "Hello World"
'They can also be placed after a statement
'The statement still executes, until the compiler arrives at the comment
Debug.Print "Hello World" 'Prints a welcome message
'Comments can have 0 indention....
'... or as much as needed
'''' Comments can contain multiple apostrophes ''''
'Comments can span lines (using line continuations) _
but this can make for hard to read code
'If you need to have mult-line comments, it is often easier to
'use an apostrophe on each line
'The continued statement syntax (:) is treated as part of the comment, so
'it is not possible to place an executable statement after a comment
'This won't run : Debug.Print "Hello World"
End Sub
'Comments can appear inside or outside a procedure
