# Guessing Game Error
**URL:** https://racket.discourse.group/t/guessing-game-error/3784
**Category:** Questions & Answers
**Tags:** question
**Created:** [June 10, 2025, 8:57pm UTC](https://racket.discourse.group/t/guessing-game-error/3784 "2025-06-10T20:57:30Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@avrame](https://racket.discourse.group/u/avrame)
#### Post date: [June 10, 2025, 8:57pm UTC](https://racket.discourse.group/t/guessing-game-error/3784/1 "2025-06-10T20:57:30Z")
I read through most of the Racket Guide and decided to write a simple guessing game to test my understanding of Racket. It works for the most part, but once the user guesses the correct answer, I get this error message: `application: not a procedure; expected a procedure that can be applied to arguments given: #`
Here is my code:
```scheme
#lang racket
(let ([my-num (random 100)])
(display "I'm thinking of a number between 1 and 100. Please enter your guess below.\n")
(define (next-round num-rounds)
(define guess (string->number (read-line)))
(cond
[(< guess my-num) (
(display "Too low, try again!\n")
(next-round (+ num-rounds 1)))]
[(> guess my-num) (
(display "Too high, try again!\n")
(next-round (+ num-rounds 1)))]
[else (display (string-append "You guessed it in " (number->string num-rounds) " guesses!"))]))
(next-round 1))
```
---
### Author:  [@shawnw](https://racket.discourse.group/u/shawnw)
#### Post date: [June 10, 2025, 9:55pm UTC](https://racket.discourse.group/t/guessing-game-error/3784/2 "2025-06-10T21:55:18Z")
> [@avrame](#):
>
> ```scheme
> ( ; <-- the offender
> (display "Too low, try again!\n")
> (next-round (+ num-rounds 1)))
>
> ```
This tries to call the function returned by calling `display` with one argument, whatever `next-round` returns. Since `display` doesn't return a function, it fails. Got to pay attention to your parenthesis and not add extraneous ones.
---
### Author:  [@avrame](https://racket.discourse.group/u/avrame)
#### Post date: [June 10, 2025, 10:32pm UTC](https://racket.discourse.group/t/guessing-game-error/3784/3 "2025-06-10T22:32:55Z")
Ah, I see - thank you