Arrays
We use an array to hold a list of values.
The name of an array begins with an '@' sign
and the individual elements can be accessed using
sequential integer indices, beginning at zero.
For example,
@data_lines = ( "Aki, 30", "Ben, 5", "Cathy, 15" );
print $data_lines[0]; # Prints "Aki, 30"
print "$data_lines[0]\n"; # Prints "Aki, 30" with a newline at the end
print $data_lines[1]; # Prints "Ben, 5"
print $data_lines[2]; # Prints "Cathy, 15"