Python3 fabs() Function

Description

The fabs() method returns the absolute value of a number as a floating-point number, e.g., math.fabs(-10) returns 10.0.

The fabs() function is similar to the abs() function, but there are two differences:

abs() is a built-in function. The fabs() function is defined in the math module.
The fabs() function only works on floating-point and integer values. abs() can also be used with complex numbers.

Syntax

The following is the syntax of the fabs() method:

import math

math.fabs( x )

Note:fabs() cannot be accessed directly; you need to import the math module and call this method via the static object.

Parameters

x -- a numeric expression, can be an integer, floating-point number, etc. The function returns the absolute value of x, i.e., a non-negative number.

Return Value

Returns the absolute value of the number.

Examples

The following demonstrates an example of using the fabs() method:

Example 1

import math

x = -1.5
y = math.fabs(x)
print(y) # Output 1.5

x = 10
y = math.fabs(x)
print(y) # Output 10.0

In the above examples,fabs(-1.5)the absolute value of -1.5 is returned as 1.5,fabs(10)and the absolute value of 10 is returned as 10.0. Note that the return value is always a floating-point number, even if the argument passed is an integer.

After running the above examples, the output is:

1.5
10.0

Example 2

#!/usr/bin/python3
import math # Import the math module

print ("math.fabs(-45.17) : ", math.fabs(-45.17))
print ("math.fabs(100.12) : ", math.fabs(100.12))
print ("math.fabs(100.72) : ", math.fabs(100.72))
print ("math.fabs(math.pi) : ", math.fabs(math.pi))