AnswerOrderedList1

Answer is an Ordered List

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This PG code shows how to write a question in which the answer is an ordered list, such as a sequence of numbers.

• Download file: File:AnswerOrderedList1.txt (change the file extension from txt to pg when you save it)
• File location in NPL: FortLewis/Authoring/Templates/Sequences/AnswerOrderedList.pg

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PG problem file	Explanation
Problem tagging data	Problem tagging:
DOCUMENT(); loadMacros( "PGstandard.pl", "MathObjects.pl", "AnswerFormatHelp.pl", ); TEXT(beginproblem());	Initialization:
Context("Numeric"); @seq = (); $seq[0] = 1; $seq[1] = 1; foreach my $i (2..6) { $seq[$i] = $seq[$i-1] + $seq[$i-2]; } $answer = join(", ",@seq); $answer = Compute("$answer");	Setup: We create an empty array @seq and then fill it with scalars using direct assignment and a foreach loop. Since the entries in the array @seq do not have commas between them, we create a Perl string $answer that joins the entries of the array @seq by a comma followed by a space ", ". Then, we make this string a MathObject by putting Compute() around it.
Context()->texStrings; BEGIN_TEXT If \( s_1 = $seq[0] \), \( s_2 = $seq[1] \), and \( s_n = s_{n-1} + s_{n-2} \), find the first seven terms of this sequence, including \( s_1 \) and \( s_2 \). Enter your answer as a comma separated list of numbers. $BR $BR Sequence = \{ ans_rule(40) \} \{ AnswerFormatHelp("numbers") \} END_TEXT Context()->normalStrings;	Main Text:
$showPartialCorrectAnswers=1; ANS( $answer->cmp(ordered=>1) );	Answer Evaluation: Since the answer is a MathObject List, which is by default unordered, we must specify that the answer checker use ordered=>1
Context()->texStrings; BEGIN_SOLUTION ${PAR}SOLUTION:${PAR} Solution explanation goes here. END_SOLUTION Context()->normalStrings; COMMENT('MathObject version.'); ENDDOCUMENT();	Solution:

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