sas introduction

When SAS program is started it has 4 main windows open:
1-the program editor
2-the log window
3-the output window
4-the explorer window
we write all codes to editor window.
SAS is organized into two steps. there are two types of steps DATA steps, which put data in a form that the SAS program can use an PROC steps which use procedures to do sth. to the data, such as sorting it, analyzing it or printing it.
A semicolon (;) is required to denote the end of a statement. spacing does not matter.You can put as many spaces between word/ keywords of the statements as you like.