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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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