|
Of course Perl also allows if/then/else statements. These are of the following form:
if ($a)
{
print "The string is not empty\n";
}
else
{
print "The string is empty\n";
}
For this, remember that an empty string is considered to be false. It will also give an "empty" result if $a is the string 0.
It is also possible to include more alternatives in a conditional statement:
if (!$a) # The ! is the not operator
{
print "The string is empty\n";
}
elsif (length($a) == 1) # If above fails, try this
{
print "The string has one character\n";
}
elsif (length($a) == 2) # If that fails, try this
{
print "The string has two characters\n";
}
else # Now, everything has failed
{
print "The string has lots of characters\n";
}
In this, it is important to notice that the elsif statement really does have an "e" missing. 
| 
