Arithmetic operators

301.2 Arithmetic Operators

Arithmetic Operators — Note 1 of 4

Use + - * / for calculations.

What you need to know

Python supports standard arithmetic operators for calculations. The / operator always returns a float (decimal), even when dividing whole numbers.

What to know

+ adds, - subtracts, * multiplies
/ always gives a float: 10 / 2 → 5.0
Operators work on variables and literals
Parentheses change the order of evaluation

Code examples

Basic arithmetic

python

a = 10
b = 3
print(a + b)   # 13
print(a - b)   # 7
print(a * b)   # 30
print(a / b)   # 3.333...

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Specification notes for programming are in Paper 2.