Type                 Range               Format
     ----------------------------------------------------------------

        shortint          -128..127              Signed 8-bit
        integer         -32768..32767            Signed 16-bit
        longint    -2147483648..2147483647       Signed 32-bit
        byte                 0..255              Unsigned 8-bit
        word                 0.65535             Unsigned 16-bit

    Arithmetic operations with type integer operands use 8-bit, 16-bit,
    or 32-bit precision, according to the following rules:

    The type of an integer constant is the predefined integer type
    with the smallest range that includes the value of the integer
    constant.

    The expression on the right of an assignment statement is evaluated
    independently from the size of the variable on the left.

    A type integer value can be explicitly converted to another interger
    type through typecasting.