SAS Programming Language for Dummies
The SAS programming language has evolved over half a century. The result is fascinating: new shorthand methods have emerged. These are not immediately obvious. Five basic points to consider when starting to learn SAS https://xrust.ru/:
– It’s not just a programming language. It’s a suite of capabilities. Unlike many other programming languages, it has built-in procedures and functions designed for working with data and statistics. Other languages, such as Python or Java, require additional libraries and packages to add the features you need. With SAS, everything is already available; you just need to know where to look.
– It’s a 4GL. This language is known as a fourth-generation language, which means it provides a higher level of abstraction than functional or object-oriented languages like C or Java. Built-in operators and procedures reduce the amount of code and logic you need to create to perform your tasks.
– The SAS DATA step is executed in two phases: compile time and execution time. During compile time, syntax is checked, the code is translated into machine language, data types and lengths are defined, and program data vectors (PDVs) are created. During execution time, SAS reads and processes data, performs calculations, evaluates conditional logic, and writes any output or files. Understanding how these two phases work can help you write and debug efficient SAS programs.
– SAS macro commands are processed and resolved first. You can think of the SAS macro language as a text generator: it’s code that can generate—through a few lines of logic and loops—much more code, which is then compiled and executed during runtime. It’s powerful and risky at the same time. That’s why it’s better to first get your core code working and then add any macro logic you want for conditions and loops.
– There are many ways to do almost anything in SAS. As a programming language, SAS has been around for over 50 years, and syntax developed decades ago still works today. However, for most tasks, there are newer and better ways to get the job done.
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