Editing INTERCAL (section)

=== Data structures ===
INTERCAL-72 (the original version of INTERCAL) had only four [[data type]]s: the 16-[[bit]] [[integer]] (represented with a <code>.</code>, called a "spot"), the 32-bit integer (<code>:</code>, a "twospot"), the [[Array data type|array]] of 16-bit integers (<code>,</code>, a "tail"), and the array of 32-bit integers (<code>;</code>, a "hybrid"). There are 65535 available variables of each type, numbered from <code>.1</code> to <code>.65535</code> for 16-bit integers, for instance. However, each of these variables has its own [[stack (data structure)|stack]] on which it can be pushed and popped (STASHed and RETRIEVEd, in INTERCAL terminology), increasing the possible complexity of data structures.<ref name="manual72"/> More modern versions of INTERCAL have by and large kept the same data structures, with appropriate modifications; TriINTERCAL, which modifies the [[radix]] with which numbers are represented, can use a 10-[[trit (computing)|trit]] type rather than a 16-bit type,<ref name="manualick"/> and CLC-INTERCAL implements many of its own data structures, such as "classes and lectures", by making the basic data types store more information rather than adding new types.<ref name="clc"/> Arrays are dimensioned by assigning to them as if they were a [[scalar (computing)|scalar]] variable. Constants can also be used, and are represented by a <code>#</code> ("mesh") followed by the constant itself, written as a [[decimal]] number; only integer constants from 0 to 65535 are supported.<ref name="manual72"/>