Numbers

Python supports integers (int) and floats (float). Integers have arbitrary precision.

Math Operations

• + - * basic arithmetic
• / float division, // floor division
• % modulo, ** exponentiation

Math & Random Modules

math.sqrt(), math.ceil(), math.floor(), random.randint()

Syntax

PYTHON

1
2
3
4
5
6
7

import math, random
print(10 / 3)    # 3.333...
print(10 // 3)   # 3
print(10 ** 3)   # 1000
print(math.sqrt(16))   # 4.0
print(math.pi)         # 3.14159...
print(random.randint(1, 10))

Python Numbers and Math

PYTHON

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

a, b = 10, 3

print("Add:", a + b)
print("Subtract:", a - b)
print("Multiply:", a * b)
print("Divide:", a / b)
print("Floor div:", a // b)
print("Modulus:", a % b)
print("Power:", a ** b)

# Built-ins
print("Round:", round(3.7))
print("Abs:", abs(-5))
print("Min:", min(3, 1, 2))
print("Max:", max(3, 1, 2))
print("Sum:", sum([1, 2, 3]))

# Import math
import math
print("Sqrt:", math.sqrt(16))
print("Pi:", round(math.pi, 4))

Try It Yourself

Practice

1

Exercise

Calculate triangle area given base=10, height=5.

Answer

print(0.5 * 10 * 5)

2

Exercise

Print 5 random numbers 1-50.

Answer

import random
for _ in range(5): print(random.randint(1,50))

Quick Quiz

1

What is 17 // 5?

3.4

3

4

2

Floor division returns 3.

Retry Quiz

Interview Questions

Difference between / and //?

/ returns float (3.333), // returns floor integer (3).

Previous

Strings

Tutorial Complete

Back to Python