An assignment statement uses  an  assignment  operator  (:=)  to
  assign a value to a variable or function identifier.

  Syntax:

     variable-access := expression

  The 'variable-access' is an identifier, array component,  record
  component, pointer dereference, or file buffer.

  The  'expression'  is  a  run-time  expression  whose  type   is
  assignment  compatible with the type of the variable.  The value
  of the expression is the value assigned to the variable.

1  –  Examples

    X := 1;      {variable 'X' is assigned the value 1}
    T := A < B;  {value of Boolean expression 'A < B' is assigned to 'T'}
    Vowels := ['A', 'E', 'I', 'O', 'U'];  {set variable 'Vowels' is
                                           assigned the set constructor
                                           ['A', 'E', 'I', 'O', 'U']}