introduction to web programming Figuring out how many element 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].

Previous | Next | Table of Contents