Boolean

Check if a value is a boolean

Given a file named “main.scm” with:

(import (scheme base))

(write-u8 (if (boolean? <value>) 65 66))

When I successfully run scheme main.scm

Then the stdout should contain exactly “<output>”.

Examples

value	output
#f	A
#t	A
’()	B

Use a not operator

Given a file named “main.scm” with:

(import (scheme base))

(write-u8 (if (not <value>) 65 66))

When I successfully run scheme main.scm

Then the stdout should contain exactly “<output>”.

Examples

value	output
#f	A
#t	B