;; The first three lines of this file were inserted by DrScheme. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib "htdp-beginner-reader.ss" "lang")((modname symbols) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f ())))
;; Symbols

'A 
'Hi
'HiThere!
'Yes
'No
'what??
'2%and&5

;; no spaces allowed:
;'I have a space

;; functions can return symbols:
(define (check-even x)
  (cond
  [(even? x) 'EvenNumber]
  [(odd? x) 'OddNumber]
  )
)

(check-even 4)
(check-even 5)

;; Symbols equality:
(symbol=? 'Yes 'No)
(symbol=? 'Yes 'yes)
(symbol=? 'Yes 'Yes)