Python math.floor() – Floor of a Number

Python math.floor()

math.floor(x) function returns the largest integer less than or equal to x.

Syntax

The syntax to call floor() function is

math.floor(x)

where

Parameter	Required	Description
x	Yes	A numeric value.

If x is infinity, then floor(x) raises OverflowError.

If x is nan, then floor(x) raises ValueError.

Examples

1. Find floor value of a float number

In the following program, we take a floating point number in x, and find its floor value.

Python Program

import math

x = 3.14
result = math.floor(x)
print('floor(x) :', result)

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Output

floor(x) : 3

2. Find floor value of a negative float number

In the following program, we take a negative floating point number in x, and find its floor value.

Python Program

import math

x = -3.14
result = math.floor(x)
print('floor(x) :', result)

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Output

floor(x) : -4

3. Find floor value of infinity

In the following program, we take the infinity constant in x, and find its floor value.

Python Program

import math

x = math.inf
result = math.floor(x)
print('floor(x) :', result)

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Output

OverflowError: cannot convert float infinity to integer

4. Find floor value of an integer

In the following program, we take an integer value in x, and find its floor value.

Python Program

import math

x = 3
result = math.floor(x)
print('floor(x) :', result)

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Output

floor(x) : 3

5. Find floor value of nan

In the following program, we take nan (not a number) constant in x, and find its floor value.

Floor value of nan.

Python Program

import math

x = math.nan
result = math.floor(x)
print('floor(x) :', result)

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Output

ValueError: cannot convert float NaN to integer

Summary

In this Python Math tutorial, we learned the syntax of, and examples for math.floor() function.