Are SAS variables case sensitive?
SAS is not case-sensitive. You can use capital or lowercase letters in your SAS variables. Click to see full answer. Also know, are SAS macro variables case sensitive? A macro variable name cannot contain any special characters other than the underscore. Macro variable names are case insensitive.
What is a macro variable in SAS?
The value of a macro variable remains constant until it is specifically changed. Macro variables are independent of SAS data set variables. Note: Only printable characters should be assigned to macro variables. Non-printable values that are assigned to macro variables might cause unpredictable results.
What is the correct way to use cases in macro variables?
Case when using macro variables. Re: Case when using macro variables. One solution is to create a macro function which creates the cases: Or you can use the values directly, instead of the CURRENCIES macro variable, if you only refer to them once: Re: Case when using macro variables.
How to make string operations case insensitive in SAS?
Thus, when you want to make string operations case insensitive, you must take precautions (e.g. upcase (name) = "JOHN"). I have found one place where case sensitivity occurs. I have a dataset in a data library and from within SAS EG I right click on the dataset and choose rename.
Are Macros case sensitive?
Directives and Macros are Case-Insensitive.
Are variables are case sensitive?
Variable names are not case sensitive. That is, you can use a name as uppercase on one line and lowercase on the next; both refer to the same variable.
What is a macro variable in SAS?
A macro variable in SAS is a string variable that allows you to dynamically modify the text in a SAS program through symbolic substitution. The following example demonstrates how to create and use a macro variable. First we set up some system options to have a more concise output style.
How do I assign a value to a macro variable in SAS?
The simplest way to assign a value to a macro variable is to use the macro program statement %LET: %let dsname=Newdata; DSNAME is the name of the macro variable. Newdata is the value of the macro variable DSNAME.
What is not case sensitive?
Anything that is not case-sensitive means that any uppercase or lowercase character can be entered. For example, the Windows command line or MS-DOS is not case-sensitive, however, the Linux command line is case sensitive.
Which programming languages are not case sensitive?
In programming languages Others are case-insensitive (i.e., not case-sensitive), such as ABAP, Ada, most BASICs (an exception being BBC BASIC), Fortran, SQL (for the syntax, and for some vendor implementations, e.g. Microsoft SQL Server, the data itself) and Pascal.
How long can a macro variable be?
65,534 bytesMacro variable values have a maximum length of 65,534 bytes. The length of a macro variable is determined by the text assigned to it instead of a specific length declaration. So its length varies with each value that it contains.
How do macros work in SAS?
SAS has a powerful programming feature called Macros which allows us to avoid repetitive sections of code and to use them again and again when needed. It also helps create dynamic variables within the code that can take different values for different run instances of the same code.
How do you use macro variables?
After a macro variable is created, you typically use the variable by referencing it with an ampersand preceding its name (&variable-name), which is called a macro variable reference. These references perform symbolic substitutions when they resolve to their value.
How do you define a macro variable?
The process to redefine a Macro is:Macro must be defined.When, you want to redefine the Macro, first of all, undefined the Macro by using #undef preprocessor directive.And, then define the Macro again by using #define preprocessor directive.
How do I change a macro variable to numeric in SAS?
Re: Convert macro variable to numeric So, try this: %let ID=1000 ; PROC SQL; SELECT * FROM TABLE WHERE FORMULARY_ID = INPUT("&ID". ,8.); QUIT; Of course, you don't need to do that. This should work as well.
Which of the following is one way to assign values to a macro variable?
One of the easiest ways to define a macro variable is through the %LET statement. (Macro language statements always start with a %). This statement works much like an assignment statement in the DATA step.
What is macro variable in SAS?
Macro variables are tools that enable you to dynamically modify the text in a SAS program through symbolic substitution . You can assign large or small amounts of text to macro variables, and after that, you can use that text by simply referencing the variable that contains it.
Why is a macro variable called a macro variable?
A variable in a local symbol table is called a local macro variable. It has local scope because its value is available only while the macro is executing.
What is a global macro variable?
A variable in the global symbol table is called a global macro variable. This variable has global scope because its value is available to any part of the SAS session (except in CARDS or DATALINES statements). Other components of SAS might create global macro variables, but only those components created by the macro processor are considered ...
What does it mean when a macro variable is defined?
When a macro variable is defined, the macro processor adds it to one of the program's macro variable symbol tables. When a macro variable is defined in a statement that is outside a macro definition (called open code) or when the variable is created automatically by the macro processor (except SYSPBUFF), the variable is held in ...
Does macro data have character data?
So its length varies with each value it contains. Macro variables contain only character data. However, the macro facility has features that enable a variable to be evaluated as a number when it contains character data that can be interpreted as a number.
Why is name1 and name2 valid in SAS?
Because NAME1 and NAME2 are valid SAS names, the macro processor searches for those macro variables rather than for NAME, and the references pass into the DATA statement without resolution. In a macro variable reference, the word scanner recognizes that a macro variable name has ended when it encounters a character that is not used in a SAS name. ...
What is a period in macros?
A period immediately following a macro variable reference acts as a delimiter. That is, a period at the end of a reference forces the macro processor to recognize the end of the reference. The period does not appear in the resulting text.