Arithmetic Operators

Arithmetic operators do math with numbers.

The tricky ones

/ always returns a float:

python
print(10 / 3)

### 3.3333333333333335
print(8 / 2)

### 4.0

// divides and rounds down to a whole number:

python
print(10 // 3)

### 3
print(-10 // 3)

### -4 (rounds down, not toward zero)

% gives the remainder:

python
print(10 % 3)

### 1
print(7 % 2)

### 1 (odd)
print(8 % 2)

### 0 (even)

** raises to a power:

python
print(2 ** 3)

### 8

Division by zero

Dividing by zero raises ZeroDivisionError:

python
print(1 / 0)

### ZeroDivisionError

TL;DR

• / is float division, // is floor division.
• % is the remainder, ** is power.
• Modulus is great for even/odd checks.
• Dividing by zero errors out.