#### Example.

Input:

T:=table(3=-10,"a"=10,"b"=20,"c"=30,"d"=40):;

Input:

T["b"]

Output:

20

Input:

T[3]

Output:

−10

Remark.
Tables can be created and the elements of a table can be changed using the := assignment.

- If T is a symbolic variable then the assignment T(index_name:=element_value will create a table T with one element.
- If n is an integer, then the assignment T(n):=obj will do the following:
  - If the variable T was assigned to a list or a sequence, then the nth element of T is modified.
  - if the variable T was not assigned, a table T is created with one entry (corresponding to the index n). Note that after the assignment T is not a list, despite the fact that n is an integer.