Arrays
NASL provides support for two types of array structures: standard and string. Standard
arrays are indexed by integers, with the first element of the array at index 0. String-
indexed arrays, also known as hashes or associative arrays, allow you to associate a value
with a particular key string; however, they do not preserve the order of the elements
contained in them. Both types of arrays are indexed using the [] operator.
It is important to note that if you want to index a large integer, NASL has to allo-
cate storage for all of the indices up to that number, which may use a considerable
amount of memory.To avoid wasting memory, convert the index value to a string and
use a hash instead.
NULL
NULL is the default value of an unassigned variable ...