An expression sequence is a group of Maple expressions separated by commas. Expression sequences preserve the order and the repetition of their elements.

a, b, b, c, b, a;

$a,b,b,c,b,a$

See Expression Sequences for more information.

A list is a collection of elements separated by commas and enclosed in square brackets. Maple preserves the order and repetition of items in a list. As a result, you can extract a particular element from a list.

marks := [92,86,91,76,83,88,85,90,88,79,81];

$\mathrm{marks}≔\left[92\,86\,91\,76\,83\,88\,85\,90\,88\,79\,81\right]$

marks[2];

$86$

See Sets and Lists for more information.

A set is a collection of elements enclosed in braces. Maple preserves neither order nor repetition in a set; therefore these three sets are equivalent.

{a,b,c},{c,a,b},{a,a,b,c,a};

$\left\{a\,b\,c\right\},\left\{a\,b\,c\right\},\left\{a\,b\,c\right\}$

See Sets and Lists for more information.

An Array is a multidimensional data structure which can be indexed by integer ranges. The following is an Array of powers of 2.

powers_of_two:= Array( 1..4, [2,4,8,16] );

$\mathrm{powers\_of\_two}≔\left[\begin{array}{cccc}2& 4& 8& 16\end{array}\right]$

powers_of_two[3];

$8$

See Array for more information.

A table is similar to an array, but it can have anything as indices, not just integers.

translate:= table([one=eins, two=zwei, three=drei]);

$\mathrm{translate}≔table\left(\left[\mathrm{one}=\mathrm{eins}\,\mathrm{three}=\mathrm{drei}\,\mathrm{two}=\mathrm{zwei}\right]\right)$

translate[two];

$\mathrm{zwei}$

See table for more information.

A string is a sequence of characters that has no value other than itself. It is created by enclosing a string of characters within a pair of double-quotes.

astring:="This is a string.";

$\mathrm{astring}≔''This\; is\; a\; string.''$

astring[11..16];

$''string''$

See strings for more information.

The Data Structures Tutorial gives a more in-depth introduction to the Maple data structures.