Logical operators

301.8 Boolean Expressions

Boolean Expressions — Note 2 of 3

Use AND OR NOT.

What you need to know

Logical operators combine Boolean expressions. and requires both to be True, or requires at least one, and not flips True to False or vice versa.

What to know

and: both must be True → True and True = True
or: at least one True → False or True = True
not: reverses the value → not True = False
Use parentheses to group complex conditions

Code examples

Logical operators

python

age = 16
has_id = True

if age >= 18 and has_id:
    print("Entry allowed")
if age < 13 or age > 65:
    print("Discount applies")
if not has_id:
    print("ID required")

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Specification notes for programming are in Paper 2.

Logical operators

301.8 Boolean Expressions

Practise exam questions

Boolean Expressions — Note 2 of 3

Use AND OR NOT.

What you need to know

Logical operators combine Boolean expressions. and requires both to be True, or requires at least one, and not flips True to False or vice versa.

What to know

and: both must be True → True and True = True
or: at least one True → False or True = True
not: reverses the value → not True = False
Use parentheses to group complex conditions

Code examples

Logical operators

python

age = 16
has_id = True

if age >= 18 and has_id:
    print("Entry allowed")
if age < 13 or age > 65:
    print("Discount applies")
if not has_id:
    print("ID required")

← Previous noteComparison operators301.8 Boolean Expressions Next note →Translate logic301.8 Boolean Expressions

Back to Boolean Expressions

Specification notes for programming are in Paper 2.