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ANSI Common Lisp  25 Environment 25.2 Dictionary of Environment
| 25.2.23 /, //, /// |
Variable |
- Value Type:
-
a proper list.
- Initial Value:
-
implementation-dependent.
- Description:
-
The variables /, //, and /// are maintained by
the Lisp read-eval-print loop to save the values of results that
were printed at the end of the loop.
The value of / is a list of the most recent values that were printed,
the value of // is the previous value of /, and
the value of /// is the previous value of //.
The values of /, //, and /// are updated immediately
prior to printing the return value of a top-level form by the
Lisp read-eval-print loop. If the evaluation of such a form
is aborted prior to its normal return, the values of /, //, and ///
are not updated.
- Examples:
-
(floor 22 7)  3, 1
(+ (* (car /) 7) (cadr /)) 22
- Affected By:
-
Lisp read-eval-print loop.
- See Also:
-
- (variable),
+ (variable),
* (variable),
Section 25.1.1 Top level loop
- Allegro CL Implementation Details:
-
None.
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