+, ++, +++ | Variable |

**Value Type**an

*object*.**Initial Value****Description**The

*variables***+**,**++**, and**+++**are maintained by the*Lisp read-eval-print loop*to save*forms*that were recently*evaluated*.The

*value*of**+**is the last*form*that was*evaluated*, the*value*of**++**is the previous value of**+**, and the*value*of**+++**is the previous value of**++**.**Examples**(+ 0 1) → 1 (- 4 2) → 2 (/ 9 3) → 3 (list + ++ +++) → ((/ 9 3) (- 4 2) (+ 0 1)) (setq a 1 b 2 c 3 d (list a b c)) → (1 2 3) (setq a 4 b 5 c 6 d (list a b c)) → (4 5 6) (list a b c) → (4 5 6) (eval +++) → (1 2 3) #.`(,@++ d) → (1 2 3 (1 2 3))

**Affected By****See Also****-**(*variable*),*****(*variable*),**/**(*variable*), Section 25.1.1 (Top level loop)