It is helpful to add comments or "REMarks" to your program. There are two ways to do this.
The first is the Rem statement:
REM [comment]
The Second is the single quote ' shorthand rem.
' [comment]
A single quote may be used at the end of lines.
For Example:
Rem This is a comment
' This is also a comment
a = 0 ' apple counter
b = 0 ' bean counter
for i = 0 to 100
a = a + i ' add apples to apples
next i
Do not put a comment at the end of a line label.
MyLabel: ' This will generate an error