Traditional Answer Checkers - PGML
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Using Traditional Answer Checkers
The answer blanks in PGML usually use Category:MathObjects to provide the answer checkers for them, but you can also use the traditional answer checkers, like num_cmp() and str_cmp() in PGML. To do so, simply include the traditional-answer-checker function-call in the braces following the answer blank.
$a = 3; $b = 5;
BEGIN_PGML
The value of [: [$a] + [$b] :] is [________]{strict_num_cmp($a+$b)}
END_PGML
The traditional string answer checkers amy be useful to use, since they provide some options not available in MathObjects, and don't require setting up the context to include the desired strings.
