README.md

Starter function definitions for 1380 Reading quiz 5

Refer to Racket docs for the specification of <=

Grading goes like this:

Percentage	Final grade
90-100%	A
80-89%	B
70-79%	C
60-69%	D
0-59%	F

letter-grade.rkt

(define (letter-grade num-grade)
  (cond
    [(<= 90 num-grade 100) "A"]
    [(...) "B"]
    [(...) "C"]
    [(...) "D"]
    [else "F"]))


(define (letter-grade-2 num-grade)
  (cond
    [(...) "F"]
    [(...) "D"]
    [(...) "C"]
    [(...) "B"]
    [else "A"]))