SAMS Teach Yourself Perl in 24 Hours THIRD EDITION

Workshop

Quiz

1:	The while statement loops as long as a condition is true. What statement loops as long as a condition is false? if (not ) {} while (! condition) {}
2:	Is the following expression true or false? (0 and 5) || ( ("0" or 0 or "") and (6 and "Hello")) or 1 True False
3:	What is the value of $i after this loop is run? for($i=0; $i<=10; $i++) { } 10 9 11

Answers

A1:	b. The while (! condition ) {} syntax loops until the condition is false.
A2:	a. The expression can be reduced in these steps: (false) || ( ( false ) and ( true ) ) or true false || false or true true
A3:	c. The test is $i<=10, so when the test is finally false, $i must be 11. If you got this one wrong, don't worry. It's such a common mistake that it even has a special name among ...