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Sams Teach Yourself Perl in 21 Days, Second Edition by Rafe Colburn, Laura Lemay

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Workshop

The workshop provides quiz questions to help you solidify your understanding of the material covered and exercises to give you experience in using what you've learned. Try and understand the quiz and exercise answers before you go on to tomorrow's lesson.

Quiz

1:What's the difference between the postfix increment operator ($x++) and the prefix increment operator (++$x)?
A1: The difference in prefix and postfix operators is when the variable reference is used and when its value is evaluated. Prefix operators increment the value before using it; postfix increments the variable afterward.
2:What does operator precedence determine? How about associativity?
A2: Operator precedence determines which parts of an expression are evaluated first ...

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