1.3 Operators

Operators are symbols that do something with values: maths, comparison, or logic.

Maths operators

Symbol	Meaning	Example
+	Add	5 + 3 → 8
-	Subtract	5 - 3 → 2
*	Multiply	5 * 3 → 15
/	Divide	6 / 3 → 2.0
//	Divide (whole number)	7 // 2 → 3
%	Remainder	7 % 2 → 1

You can use variables too: score * 2, health - 1.

Comparison operators

These compare two values and give True or False:

Symbol	Meaning	Example
==	Equal to	5 == 5 → True
!=	Not equal to	5 != 3 → True
<	Less than	3 < 5 → True
>	Greater than	10 > 7 → True
<=	Less or equal	4 <= 4 → True
>=	Greater or equal	3 >= 3 → True

Example:

score = 10
print(score > 5)   # True
print(score == 10) # True

Logical operators

• and — both sides must be True: (age >= 10) and (age < 20)
• or — at least one side True: (score == 0) or (lives == 0)
• not — flip True/False: not game_over

Mini project: Simple calculator

Ask the user for two numbers (use int(input(...))). Then print:

• Their sum
• Their product (multiply)
• Whether the first is greater than the second (True or False)

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Next: 2.1 Conditionals — making decisions with if and else.