Common SAS syntax rules
If you are writing a program that will be used more than once, or by someone else, adding explanatory comments to the program is a wise thing to do. These can be instructions, reminders, explanations or any other text that helps you use the program. Comments are part of your SAS program, but are ignored by SAS when running the program. By default they are colored green in the Editor window.
SAS provides two methods for creating comments, single statement and unlimited text.
Single statement comment
******* comment on a separate line.
Use multiple asterisks to highlight more ******;
Unlimited text comments
/* comment blocks of code that are not needed
Be careful to pair the /* and */ symbols, as unexpected results can happen. For example, a */ by itself may cause problems. Do not put a space between the asterisk and the slash.