Why repeat jumping

_$ (setq cnt 0)
(setq rad 0)
(setq n 200)
(repeat n
(cond ((and (>= cnt rad)(< n rad))))
(setq rad (+ cnt rad))
(princ "\n")(princ "(setq rad")(princ " ")
(princ rad)(princ ")")
(setq cnt (1+ cnt))
)
0
0
200

(setq rad 0)
(setq rad 1)
(setq rad 3)
(setq rad 6)
(setq rad 10)
(setq rad 15)
(setq rad 21)
(setq rad 28)
---------------------------etc.....

Why my repeat program jumping,I would plan like this

(setq rad 0)
(setq rad 1)
(setq rad 2)
(setq rad 3)
(setq rad 4)
(setq rad 5)
(setq rad 6)
(setq rad 7)
---------------------------etc.....

 

Adesu

Reread your code and you will find out why...

Cheers

 

Look closely, Ade. It is doing exactly what you have told it to do ;-)

first run:
rad = 0
cnt=0
rad=0+0

second run
rad=0
cnt=1
rad=1+0

third run
rad=1
cnt=2
rad=1+2

fourth run
rad=3
cnt=3
rad=3+3

fifth run
rad=6
cnt=4
rad=6+4

etc.

 

or beautify

 

It's perfect,I 've got it
_$ (setq cnt 1)
(setq rad 0)
(setq n 200)
(repeat n
(cond ((and (>= cnt rad)(< cnt rad))))
(setq rad (+ 1 rad)) ; this problem
here
(princ "\n")(princ "(setq rad")(princ " ")
(princ rad)(princ ")")
(setq cnt (1+ cnt))
)
1
0
200

(setq rad 1)
(setq rad 2)
(setq rad 3)
(setq rad 4)
(setq rad 5)
(setq rad 6)
(setq rad 7)
;----------------------(snip)