What are boolean operators in Pascal?
In this shot, let’s talk about Boolean operators in Pascal. We often use these boolean operators in condition variables.
Operator | How does it work | Condition Statement |
and | This refers to the AND operator often used in boolean calculations. It gives output True if both inputs A and B are True. | Output = True IF (A = True and B = True) |
and then | This is similar to the AND operator often used in boolean calculations. It is a conditional AND, where the second input B is only checked if first input A is True. It gives output True if both inputs A and B are True. This condition is used to clarify the order of execution of condition statements, left to right. | Output = True IF (A = True and then B = True) |
or | This refers to the OR operator often used in boolean calculations. It gives output True if any of the inputs A or B are True. | Output = True IF (A = True or B = True) Output = True IF (A = True or B = False) Output = True IF (A = False or B = True) |
or else | This is similar to the OR operator often used in boolean calculations. It is a conditional OR, where the second input B is only checked if first input A is False. It gives output True if both any of inputs A or B are True. This condition is used to clarify the order of execution of condition statements, left to right. | Output = True IF (A = False or else then B = True) |
not | This refers to the OR operator often used in boolean calculations. It is used to reverse the initial value of any input. | output = False if not A output = False if not B output = true if (not A or B) |
Code
program beLogical;
var a, b : boolean;
// initialise the boolean values a and b
begin
// declare both of them as True initially
a := true;
b := true;
// If both are True, AND will result in True.
// This means that condition will be true overall.
if (a and b) then
writeln('Condition And is True');
// If both are True, OR will result in True.
// This means that condition will be true overall.
if (a or b) then
writeln('or condition is True');
end.
Output:
Condition And is True
or condition is True
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