Sum of lengths

Is there any way to select several lines on a drawing and have autocad list
the sum of their lengths?

 

Paul has a good freebie on his site.
Go here and download tlen.lsp:

http://www.turvill.com/t2/free_stuff/

It does circles, arcs, polylines as well as lines.

 

Here... have fun..

(defun c:develop (/ iter devel $a total data1
stpt endpt distl strad endrad distr
)
(setvar "osmode" 0)
(setq $a nil
iter 0
devel 0.0
stpt nil
endpt nil
strad 0.0
endrad 0.0
rad 0.0
distl 0.0
distr 0.0
total 0.0
devel 0.0
)
(setq $a (ssget))
(setq total (sslength $a))
(while (< 0 total)
(progn
(setq data1 (cdr (entget (ssname $a iter))))
(cond
((= (cdr (assoc 0 data1)) "LINE")
(Progn
(setq
stpt
(cdr (assoc 10 data1))
endpt
(cdr (assoc 11 data1))
)
(setq distl (abs (distance stpt endpt)))
(setq devel (+ devel distl))
) ;_END PROGN
) ;_END COND1
((= (cdr (assoc 0 data1)) "ARC")
(Progn
(setq
strad
(cdr (assoc 50 data1))
endrad
(cdr (assoc 51 data1))
rad
(cdr (assoc 40 data1))
)
(cond
((> endrad strad)
(setq distr (* rad (- endrad strad)))
)
((setq distr (* rad (+ endrad (- (* 2 pi) strad))))
)
(t nil)
) ;_end COND
(setq devel (+ devel distr))
) ;_END PROGN
) ;_END COND2
(T nil)
) ;_END COND
(setq iter (+ 1 iter))
(setq total (- total 1))
) ;_END PROGN
) ;_END WHILE
(alert (strcat "Longueur totale : " (rtos devel) " unités"))
(setq $a nil)
(setvar "osmode" 183)
) ;_end DEFUN DEVELOP