AQA 8525 · Section 3.2 · 3.2.4/5

Relational & Boolean
Operators

Comparison Operators · AND / OR / NOT · Truth Tables

CSZoneAQA GCSE Computer Science 8525

Relational Operators

Comparing Values in AQA Pseudocode

Operator	Meaning	Example	Result
=	Equal to	5 = 5	True
≠	Not equal to	5 ≠ 3	True
<	Less than	3 < 5	True
>	Greater than	10 > 20	False
<=	Less than or equal	5 <= 5	True
>=	Greater than or equal	4 >= 7	False

Boolean Operators

AND / OR / NOT in AQA Pseudocode

Operator	Meaning	Example
AND	Both conditions must be True	age >= 18 AND hasID = True
OR	At least one condition must be True	colour = 'red' OR colour = 'blue'
NOT	Reverses True/False	NOT found

IF age >= 18 AND score >= 50 THEN
OUTPUT 'Eligible'
ENDIF

IF day = 'Sat' OR day = 'Sun' THEN
OUTPUT 'Weekend'
ENDIF

Truth Tables

AND / OR / NOT Truth Tables

AND

A	B	A AND B
T	T	T
T	F	F
F	T	F
F	F	F

OR

A	B	A OR B
T	T	T
T	F	T
F	T	T
F	F	F

NOT

A	NOT A
T	F
F	T

AND:Both must be true. OR:At least one must be true. NOT:Flips the result.

Exam Practice

Have a go at this question

AQA-style question

What is the output of the following code when age = 20 and member = True?

IF age >= 18 AND NOT member THEN
OUTPUT 'Pay full price'
ELSE
OUTPUT 'Discount applied'
ENDIF

2 marks

age >= 18 → True. NOT member → NOT True → False. True AND False → False.
Output: 'Discount applied' [2]

Key Takeaways

What to Remember

Relational operators return True or False: = ≠ < > <= >=

AND — both true · OR — at least one true · NOT — reverses

AND is True only when both operands are True

Combine operators: (age >= 18 AND hasTicket = True)