Write a function in Scheme or rules in Prolog called countlt that takes a list of numbers, L, and another number, N, and returns the count of numbers less than N in the list L. Example calls Scheme: (countlt '(6 1 9) 4) -> 1 (countlt '(50 27 13) 1) -> 0 Prolog ?- countlt (I6, 1, 91, 4, X). X = 1. ?- countlt (I50, 27, 131, 1, x). x = 0.
Write a function in Scheme or rules in Prolog called countlt that takes a list of numbers, L, and another number, N, and returns the count of numbers less than N in the list L. Example calls Scheme: (countlt '(6 1 9) 4) -> 1 (countlt '(50 27 13) 1) -> 0 Prolog ?- countlt (I6, 1, 91, 4, X). X = 1. ?- countlt (I50, 27, 131, 1, x). x = 0.
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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Transcribed Image Text:Question 13
Write a function in Scheme or rules in Prolog called countlt that takes a list of numbers, L. and another number. N. and returns the count of numbers less than N in the list L.
Example calls
Scheme:
(countlt '(6 1 9) 4) -> 1
(countlt '(50 27 13) 1) -> 0
Prolog
?- countlt (I6, 1, 91, 4, X) .
X = 1.
?- countlt ( [50, 27, 131, 1, X).
X = 0.
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