Why nil?

[Perifanos]

Please someone tell me why this:

 

(> (* 126 a) 3000)

 

returns nil, when a=3 (or any other value) ?

[Lee Mac]

Because 378 is less than 3000 perhaps?

 

_$ (setq a 3)
3
_$ (> (* 126 a) 3000)
nil
_$ (setq a 30)
30
_$ (> (* 126 a) 3000)
T

[Perifanos]

Right, this is why its called lost in stupid parenthesis I guess...Sorry, my eyes are flickering after some time doing lisp...

[Perifanos]

ok, since you've been so kind please tell me why this is producing an error?

 

(defun roundnum (a n /)
  ((/ (float(fix (* a (expt 10 n)))) (expt 10 n)))
)

[Lee Mac]

Your first opening parenthesis is not evaluating a function:

 

(defun roundnum (a n /)
  [highlight][color=red]([/highlight][/color](/ (float(fix (* a (expt 10 n)))) (expt 10 n))[color=red][highlight])[/color][/highlight]
)

 

(defun roundnum ( a n )
   (/ (float (fix (* a (expt 10 n)))) (expt 10 n))
)

[Perifanos]

I guess its not my day. Thanls alot mate.