Common SAS syntax rules
SAS statements are the instructions used to accomplish everything in SAS. Statements start with a key word, and end with a semicolon. Many statements have options, which are put at the end of the statement following a / character.
Here are some examples.
Key words in these statements are DATA, INPUT, PROC, MODEL and %. Each statement ends with a semicolon. This allows you to use multiple lines for one statement, or put multiple statements on one line. Making the program easy to read is the usual goal for such formatting decisions.
Between the keyword and the semicolon, a mix of SAS instructions and your names is used to tell SAS what to do to which variables and datasets. The thousands of pages of SAS documentation contain details and examples on how to correctly request what you want done.