{"id":2730,"date":"2021-02-11T03:15:13","date_gmt":"2021-02-11T03:15:13","guid":{"rendered":"https:\/\/www.afternerd.com\/blog\/?p=2730"},"modified":"2021-02-11T03:15:59","modified_gmt":"2021-02-11T03:15:59","slug":"round-number-nearest-integer","status":"publish","type":"post","link":"https:\/\/www.afternerd.com\/blog\/round-number-nearest-integer\/","title":{"rendered":"Python: Round a Number to the Nearest Integer"},"content":{"rendered":"\n

In many situations, you will find yourself in a situation where you want to round a floating-point number to the nearest integer in your Python 3 code. In this article, I will explain how.<\/p>\n\n\n\n

1. Using the Round() Function<\/h2>\n\n\n\n

You can use the Round built-in function in Python to round a number to the nearest integer.<\/p>\n\n\n\n

For example:<\/p>\n\n\n\n

>>> round(2.4)\n2\n>>> round(2.6)\n3\n>>> round(2.5)\n2<\/code><\/pre>\n\n\n\n
Note that in Python 3, the return type is int<\/strong>. However, if you are still on Python 2, the return type will be a float<\/strong> so you would need to cast the returned value into int<\/strong>.<\/p>\n\n\n\n
Another thing to notice here is that according to Python’s documentation<\/a>, any floating number that is mid-way between two integers (e.g. 2.5, 3.4. etc…) will be rounded to the nearest even<\/strong> choice. For example:<\/p>\n\n\n\n
>>> round(2.5)\n2\n>>> round(3.5)\n4<\/code><\/pre>\n\n\n\n
2. Without Using any Built-in Functions<\/h2>\n\n\n\n
If you want to round a number to the nearest integer without using any built-in functions in Python (maybe for a coding interview or something), then you can define the following function.<\/p>\n\n\n\n
def round_number(x):\n    if (x - int(x)) < 0.5:\n        return int(x)\n    else:\n        return int(x) + 1<\/code><\/pre>\n\n\n\n
There you go! Happy Python coding \ud83d\ude42<\/p>\n\n\n
Learning Python?<\/h3>\n
Check out the Courses section!<\/a><\/p>\n\n\n\n
Featured Posts<\/h2>\n