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Lisp - string concat

I am trying to concat strings in lisp, using clisp on linux.
I run following code:

(defun bingo ()
  (strcat "Correct! You guessed " (itoa *count*) " times."))

but, get following error:

EVAL: undefined function STRCAT
EVAL: undefined function ITOA

Any suggestion?

Solution 
  • CL-USER 1 > (format nil "This is too easy. ~a day I'll learn Lisp." 1)
"This is too easy. 1 day I'll learn Lisp."