Let lst = '(1 2 3 4 5). The function check-1? returns #t only if the input list contains 1, the function check-2? returns #t only if the input list contains 2, the function check-3? returns #t only if the input list contains 3, and the function check-4? returns #t only if the input list contains 4. What will be the following expression display: (cond ((check-1? lst) (display '1)) ((check-2? lst) (display '2)) ((check-3? lst) (display '3)) ((check-4? lst) (display '4)) (else (display '5)) ) a.1234 b.54321 c.15 d.1 e.12345
Let lst = '(1 2 3 4 5). The function check-1? returns #t only if the input list contains 1, the function check-2? returns #t only if the input list contains 2, the function check-3? returns #t only if the input list contains 3, and the function check-4? returns #t only if the input list contains 4. What will be the following expression display: (cond ((check-1? lst) (display '1)) ((check-2? lst) (display '2)) ((check-3? lst) (display '3)) ((check-4? lst) (display '4)) (else (display '5)) ) a.1234 b.54321 c.15 d.1 e.12345
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Let lst = '(1 2 3 4 5). The function check-1? returns #t only if the input list contains 1, the function check-2? returns #t only if the input list contains 2, the function check-3? returns #t only if the input list contains 3, and the function check-4? returns #t only if the input list contains 4. What will be the following expression display:
(cond
((check-1? lst) (display '1))
((check-2? lst) (display '2))
((check-3? lst) (display '3))
((check-4? lst) (display '4))
(else (display '5))
)
a.1234
b.54321
c.15
d.1
e.12345
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