This task is about arrays.

For hashes or associative arrays, please see Creating an Associative Array.

For a definition and in-depth discussion of what an array is, see Array.



Task

Show basic array syntax in your language.

Basically, create an array, assign a value to it, and retrieve an element   (if available, show both fixed-length arrays and
dynamic arrays, pushing a value into it).

Please discuss at Village Pump:   Arrays.

Please merge code in from these obsolete tasks:

   Creating an Array
   Assigning Values to an Array
   Retrieving an Element of an Array


Related tasks

   Collections
   Creating an Associative Array
   Two-dimensional array (runtime)


/* Declare an array, subscripts run from 0 to max value */
array(a, flonum, 20, 20, 3)$
 
arrayinfo(a);
/* [complete, 3, [20, 20, 3]] */
 
a[0, 0]: 1.0;
 
listarray(a);
/* [1.0, 0.0, 0.0, ..., 0.0] */
 
/* Show all declared arrays */
arrays;
/* [a] */
 
 
/* One may also use an array without declaring it, it's a hashed array */
b[1]: 1000;
b['x]: 3/4; /* hashed array may have any subscript */
 
arrayinfo(b);
/* [hashed, 1, [1], [x]] */
 
listarray(b);
/* [1000, 3/4] */