Figuring out how many elements are in an array
Figuring out how many elements are in an array
- Fortunately, Perl
provides an easy way to determine how
many elements are contained in an array. When used as a
scalar, the list array name will be equal to the number of
elements it contains. Thus, if the list array
@available_colors contains the elements: red, green, blue
and brown, then the following line would set
$number_of_colors equal to four.
$number_of_colors = @available_colors;
| Be careful when using this value in your logic. The number of elements in an array is a number counting from one. But when accessing an array, you must access starting from zero. Thus, the last element in the array @available_colors is not $available_colors[@available_colors] but rather $available_colors[@available_colors - 1]. |
Using List ArraysTable of Contents
Adding elements to a list array
