{"id":144,"date":"2020-10-03T15:07:24","date_gmt":"2020-10-03T15:07:24","guid":{"rendered":"https:\/\/www.pythontutorial.net\/?page_id=144"},"modified":"2025-03-26T06:51:27","modified_gmt":"2025-03-26T06:51:27","slug":"python-numbers","status":"publish","type":"page","link":"https:\/\/www.pythontutorial.net\/python-basics\/python-numbers\/","title":{"rendered":"Python Numbers"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you’ll learn about Python numbers and how to use them in programs.<\/p>\n\n\n\n

Python supports integers<\/a>, floats<\/a>, and complex numbers. This tutorial discusses only integers and floats. <\/p>\n\n\n\n

Integers #<\/a><\/h2>\n\n\n\n

The integers<\/a> are numbers such as -1, 0, 1, 2, and 3, .. and they have type int<\/code>.<\/p>\n\n\n\n

You can use Math operators like +, -, *, and \/ to form expressions that include integers. For example:<\/p>\n\n\n

x = 20<\/span>\ny = 10<\/span>\n\ntotal = x + y\nprint(total)\n\ndifference = x - y\nprint(difference)\n\nproduct = x * y\nprint(product)\n\nquotient = x \/ y\nprint(quotient)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
30\n10\n200\n2.0<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
To calculate exponents, you use two multiplication symbols (**<\/code>). For example:<\/p>\n\n\n
x = 3<\/span>\ny = 3<\/span>\n\npower = x ** y\nprint(power)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
27<\/code><\/span><\/pre>\n\n\n
To modify the order of operations, you use the parentheses ()<\/code>. For example:<\/p>\n\n\n
result = 20<\/span> \/ (10<\/span> + 10<\/span>)\nprint(result)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
1.0<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
Floats #<\/a><\/h2>\n\n\n\n
Any number with a decimal point is a floating-point number<\/a>. The term float means that the decimal point can appear at any position in a number.<\/p>\n\n\n\n
In general, you can use floats like integers. For example:<\/p>\n\n\n
x = 0.5<\/span>\ny = 0.25<\/span>\n\ntotal = x + y\nprint(total)\n\ndifference = x - y\nprint(difference)\n\nproduct = x * y\nprint(product)\n\nquotient = x \/ y\nprint(quotient)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
0.75<\/span>\n0.25<\/span>\n0.125<\/span>\n2.0<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
The division of two integers always returns a float:<\/p>\n\n\n
x = 20<\/span>\ny = 10<\/span>\nquotient = x \/ y\nprint(quotient)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
2.0<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
If you mix an integer and a float in any arithmetic operation, the result is a float:<\/p>\n\n\n
x = 1<\/span>\ny = 2.0<\/span>\ntotal = x + y\nprint(total)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
3.0<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
Due to the internal representation of floats, Python will try to represent the result as precisely as possible. However, you may get the result that you would not expect. For example:<\/p>\n\n\n
x = 0.1<\/span>\ny = 0.2<\/span>\ntotal = x + y\nprint(total)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
0.30000000000000004<\/span><\/code><\/span>Code language:<\/span> CSS<\/span> (<\/span>css<\/span>)<\/span><\/small><\/pre>\n\n\n
Underscores in numbers #<\/a><\/h2>\n\n\n\n
When a number is large, it’ll become difficult to read. For example:<\/p>\n\n\n
count = 10000000000<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
To make the long numbers more readable, you can group digits using underscores, like this:<\/p>\n\n\n
count = 10<\/span>_000_000_000<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
When storing these values, Python just ignores the underscores. It does so when displaying the numbers with underscores on the screen:<\/p>\n\n\n
count = 10<\/span>_000_000_000\nprint(count)<\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
10000000000<\/span><\/code><\/span>Code language:<\/span> Python<\/span> (<\/span>python<\/span>)<\/span><\/small><\/pre>\n\n\n
The underscores also work for both integers and floats.<\/p>\n\n\n\n
Note that the underscores in numbers have been available since Python 3.6<\/p>\n\n\n\n
Summary #<\/a><\/h2>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Just keep this in mind when you perform calculations with floats. And you’ll learn how to handle situations like this in later tutorials<\/a>.<\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n
Try it<\/a><\/p>\n\n\n\n