Chapter 2-3

Question 1

== or eq

Answer 1

exactly equal to

Question 2

!=

Answer 2

not equal to

Question 3

ne

Answer 3

not equal to

Question 4

if loop

Answer 4

if ($hour == 12) {
print “Lunchtime!\n”;
}

Question 5

if/else loop

Answer 5

if ($hour == 12) {
 print “Lunchtime!\n”;
} else {
 print “I'm hungry.\n”;
}

Question 6

if/elsif/else loop

Answer 6

if ($hour == 12) {
 print “Lunchtime!\n”;
} elsif ($hour == 6) {
 print “Dinner!\n”;
} else {
 print “I'm hungry.\n”;
}

Question 7

while loop

Answer 7

while ($hour

Question 8

for loop

Answer 8

for ($hour = 0; $hour

Question 9

foreach loop

Answer 9

foreach $icount (10..1) {
print “$icount “;
}
print “Blastoff.\n”;

Question 10

Functions– things that

Answer 10

• do something to their inputs
• then return the result
• use () to hold their goodies.

Question 11

function with return value

Answer 11

$return_value = function_name($var1, $var2, $var3);

Question 12

@icount = (1, 2, 3, 4, 5);

Answer 12

building a list of items

Question 13

List =

Answer 13

an ordered collection of scalars

Question 14

Array =

Answer 14

ordered collection of scalars

Question 15

Indices always start at

Answer 15

0

Question 16

access array element

Answer 16

$name[0] = “words”;

Question 17

finding the index of the last element

Answer 17

print $#rocks; # prints 2

Question 18

finding the last element in an array

Answer 18

$# = 'last element'
OR
$rocks[0] = “bedrock”;
$rocks[1] = “slate”;
$rocks[2] = “lava”;
print $rocks[$#rocks]; # prints “lava”;

Question 19

walking through a list: foreach

Answer 19

foreach $item (@array) {
print “I am looking at $item.\n”;
}

Question 20

listing literals

Answer 20

@alist = (1, 2, 3); # list of three values 1, 2, and 3

Question 21

qw

Answer 21

@alist = qw( fred barney betty wilma dino );