Answers in Option Form - PGML

Specifying the Width of an Answer Rule

Normally, the width of an answer blank in PGML is proportional to the number of underscores used in the brackets that defined the blank. So a longer answer blank uses more underscores. It is also possible to give the width of the answer blank numerically. To do so, put the width in braces following the answer.

 BEGIN_PGML
 This value of [: sqrt($a) :] is [_____]{sqrt($a)}{10}
 END_PGML

Here, the width the answer answer rule will be 10 regardless of how many underscores are used.

Specifying Answers via Options

Normally, the answer and optional width are given by enclosing them in braces following the answer blank. It is also possible to use key/value pairs to specify the answer and width (in any order).

 BEGIN_PGML
 This value of [: sqrt($a) :] is [_____]{width=>10, answer=>sqrt($a)}
 END_PGML

This takes a little more space, but make the meanings of the values more clear. It also makes it possible to provide the width without providing an answer (if you are using ANS() to specify the answer checker).

 BEGIN_PGML
 This value of [: sqrt($a) :] is [_____]{width=>10}
 END_PGML
 ANS(Real(sqrt($a))->cmp);