![]() Previous |
![]() Next |
There are cases in which you might specify an operation for which no data is available. For example, there might be no appropriate value for a given cell in a variable, for the return value of a function, or for the value of an expression that includes an arithmetic operator. In these cases, an NA
(Not Available) value is automatically supplied.
To set the values of a variable or relation to NA
, you can use an assignment statement (SET), as shown in the following example.
sales = NA