desperate over math anomily

[Anonymous]

surely 3.6 x 20 = 72

Command: (setq watts (* (/ seglen 1000) stwts))
60.0

Command: !seglen
3600

Command: !stwts
20.0

this does not help

Command: (setq watts  (fix (* (/ seglen 1000) stwts)))
60.0

Command: !seglen
3600

Command: !stwts
20.0

this works fine as it should then why does the above not work? I must be missing something!!!!!

Command: (setq twatts (fix (* (/ fixlgth 1000) stwts)))
240

Command: !fixlgth
12000

Command: !stwts
20.0

[phanaem]

The result of integers division is integer
(/ 3600 1000) -> 3
Try
(setq watts (* (/ seglen 1000.0) stwts))

[Anonymous]

YES I have just solved it myself and came on here to post that, by fluke I tried 1000.0 and it worked much to my surprise but thank you so much for solving it too if I had not managed it by fluke I would still be struggling without your post!

[stevor]

If using 2 integer ariables, ie, symbols, you can add a 1.0 to the argunements: (/ IntVar1 IntVar2 1.0) I think.

[Kent1Cooper]

---

@stevor wrote:

If using 2 integer ariables ... you can add a 1.0 to the argunements: (/ IntVar1 IntVar2 1.0) I think.

---

You think right.  Another approach is to turn either of them into a real number with the (float) function:

(/ IntVar1 (float IntVar2))