Python 3 - Number fabs() Method


The fabs() method returns the absolute value of x. Although similar to the abs() function, there are differences between the two functions. They are −

  • abs() is a built in function whereas fabs() is defined in math module.

  • fabs() function works only on float and integer whereas abs() works with complex number also.


Following is the syntax for the fabs() method −

import math

math.fabs( x )

Note − This function is not accessible directly, so we need to import the math module and then we need to call this function using the math static object.


x − This is a numeric value.

Return Value

This method returns the absolute value of x.


The following example shows the usage of the fabs() method.

import math   # This will import 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))


When we run the above program, it produces the following result −

math.fabs(-45.17) :  45.17
math.fabs(100) :  100.0
math.fabs(100.72) :  100.72
math.fabs(math.pi) :  3.141592653589793