C2 · Operators

Spec reference: Section C - Programming Paradigms
Key idea: Use arithmetic, relational and Boolean operators to manipulate and compare data.

Relational operators

Used to compare two values. The result is always a Boolean (True or False):

Operator	Meaning	Example	Result
== or =	Equal to	5 == 5	True
!= or ≠	Not equal to	5 != 3	True
<	Less than	3 < 7	True
>	Greater than	9 > 12	False
<= or ≤	Less than or equal	5 <= 5	True
>= or ≥	Greater than or equal	4 >= 6	False

---

Boolean operators

Used to combine multiple conditions:

Operator	Meaning	Example	Result
AND	Both conditions must be true	age >= 18 AND hasID = True	True only if both
OR	At least one must be true	day = "Sat" OR day = "Sun"	True if either
NOT	Inverts the result	NOT isLoggedIn	True if not logged in

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

---

Date and time operations

Programs often need to work with dates:

import datetime

today = datetime.date.today()
print(today)  # e.g. 2025-03-13

# Calculate age
born = datetime.date(2006, 5, 14)
age_days = (today - born).days
age_years = age_days // 365

---

Test Yourself

Question 1 of 5

What is the result of 17 MOD 5?