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Back to data types.

Range of values: 0 .. 18446744073709551615

Memory requirement: 8 bytes or 64 bits

A data field of the Qword data type can only take unsigned integer values. Assigning other values ​​leads to compiler error messages when the program is compiled and the compilation process is aborted. That is, the executable program is not created.

Definition of a data field of type Qword:

    qw : Qword;

Examples of assigning valid values:

  qw := 0;
  qw := 255;
  qw := 65535;
  qw := 4294967295;
  qw := 18446744073709551615;

Examples of assigning invalid values:

<syntaxhighlight lang=pascal>
  qw := '0';
  qw := '255';
  qw := '65535';
  qw := '4294967295';
  qw := '18446744073709551615';

The difference between the two examples is that the upper example is the assignment of literals of the type Integer, while the assignment of the lower example is literals of the type String.