How to use Boolean datatype in SAS?

Question

In many mainstream programming languages you can use Boolean data-type (for instance, value can be either `true` or `false`) - to represent binary "true/false". Is there a Boolean data-type in SAS too? For example, in this code, the variable `is_fruit` is meant to represent a binary `true` (1) or `false` (0) situation. As I am not aware of any Boolean data-types (or `length` types), I work around this using numeric: data is_fruit; length fruit_name $ 40 is_fruit 8.; input fruit_name $ is_fruit; datalines; apple 1 orange 1 car 0 tree 0 chicken 0 peach 1 mango 1 human 0 ; run; Output: [![enter image description here][1]][1] [![enter image description here][2]][2] To me this is not a very elegant data structure as the variable `is_fruit` is really a Boolean data-type (not numeric nor character). So my question is again... Is there a Boolean data-type (or `length` type) for the `is_fruit` above? [1]: http://i.stack.imgur.com/0Jvm1.png [2]: http://i.stack.imgur.com/j8KVk.png

Answer 1

Apparently not, upon some quick research of SAS variable types

so you will have to declare either a numeric variable and use 1 or 0 to

represent the boolean values

OR

use a STRING variable and use '1' and '0' to represent the boolean values