THE AND OR NOT STATEMENTS
The AND, OR and NOT keywords are used where you want to execute a block of code (or statement) when more than one condition is necessary.

  AND   The statement is executed only if BOTH conditions are true,

	  if  (A = 1) AND (B = 2) then writeln('Bingo!');
  OR    The statement is executed if EITHER argument is true,
	  if (A = 1) OR (B = 2) then writeln('Hurray!');
  NOT   Converts TRUE to FALSE and vsvs
	  if NOT ((A = 1) AND (B = 2)) then writeln('Wow, really heavy man!');

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CLASS EXERCISE
What is displayed after the following program is executed?

	program  AND_OR_NOT_DEMO (output);

	var      a, b, c : integer;

	begin

	         a := 5;  b := 3;  c := 99;

	         if (a = 5) or (b > 2)  then writeln('A');

	         if (a < 5) and (b > 2) then writeln('B');

	         if (a = 5) and (b = 2) then writeln('C');

	         if (c <> 6) or (b > 10) then writeln('D') else writeln('E');

	         if (b = 3) and (c = 99) then writeln('F');

	         if (a = 1) or (b = 2)   then writeln('G');

	         if not( (a < 5) and (b > 2)) then writeln('H')

	end.

Class Exercise .. Output of program AND_OR_NOT_DEMO is,

	A

	D

	F

	H