if statement within loop for statement in lisp

Asked Nov 28 '17 at 12:58

Active Nov 28 '17 at 15:56

Viewed 34 times

I'm getting an error trying to do the if statement within the loop for statement. Is it possible to put an if statement here?

(princ "Enter a number: ")

(setq number(read))

(setq number (- number 1))

(setq primechecker nil)

(loop for x from 2 to number 
   do ((if (> x 5)(princ 5)(princ x))))

edited Nov 28 '17 at 15:56

Rainer Joswig

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asked Nov 28 '17 at 12:58

Kevin

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[parens are meaningful in Lisp](https://stackoverflow.com/q/46223692/850781) – sds Nov 28 '17 at 13:51
You're trying to call `princ`'s return value as a function. – molbdnilo Nov 28 '17 at 14:50
@molbdnilo And even when you have a function `f` where `(f)` returns a function, `((f))` is not valid Common Lisp. You'd need `(funcall (f))`. – coredump Nov 28 '17 at 14:54
@coredump Ah, yes. Every time I Lisp, I stumble on that one. – molbdnilo Nov 28 '17 at 15:27

if statement within loop for statement in lisp

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