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program beBitwise;
var
a, b, c: integer;
begin
a := 60; (* 60 = 0011 1100 *)
b := 13; (* 13 = 0000 1101 *)
c := 0;
c := a and b; (* 12 = 0000 1100 *)
writeln('Line 1 - Value of c is ', c );
c := a or b; (* 61 = 0011 1101 *)
writeln('Line 2 - Value of c is ', c );
c := not a; (* -61 = 1100 0011 *)
writeln('Line 3 - Value of c is ', c );
c := a > 2; (* 15 = 0000 1111 *)
writeln('Line 5 - Value of c is ', c );
end.
When the above code is compiled and executed, it produces the following result:
Line 1 - Value of c is 12
Line 2 - Value of c is 61
Line 3 - Value of c is -61
Line 4 - Value of c is 240
Line 5 - Value of c is 15
Operators Precedence in Pascal
Operator precedence determines the grouping of terms in an expression. This affects how an
expression is evaluated. Certain operators have higher precedence than others; for example,
the multiplication operator has higher precedence than the addition operator.
For example x = 7 + 3 * 2; here, x is assigned 13, not 20 because operator * has higher
precedence than +, so it first gets multiplied with 3*2 and then adds into 7.
Here, operators with the highest precedence appear at the top of the table, those with the
lowest appear at the bottom. Within an expression, higher precedence operators will be
evaluated first.
Operators
Precedence
~, not, Highest
*, /, div, mod, and, &
|, !, +, -, or,
TUTORIALS POINT
Simply Easy Learning Page 29