Question

Write a program using DrRacket

is a member of a list

(member 1 '(2 3 4 1 5)) => true

(member 1 '(2 3 4 (1) 5)) => false

Answer 1

(print (if(member 1 (list 2 3 4 1 5)) 'true 'false))
(print (if(member 1 (list 2 3 4 (list 1) 5)) 'true 'false))

(list 2 3 4 1 5) and (list 2 3 4 (list 1) 5) creates the lists as  '(2 3 4 1 5) and  '(2 3 4 (1) 5)

member 1 (list 2 3 4 1 5)) and (member 1 (list 2 3 4 (list 1) 5)) determines if 1 is member if lists or not.

1 is member of list   '(2 3 4 1 5)

1 is not a member of list '(2 3 4 (1) 5)

Using if true and false are evaluated

(if(member 1 (list 2 3 4 1 5)) 'true 'false))

(if(member 1 (list 2 3 4 (list 1) 5)) 'true 'false))

Output