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# Python | fabs() vs abs()

• Last Updated : 30 Oct, 2019

Both the abs() and the fabs() function is used to find the absolute value of a number.

Syntax of abs()

```abs(number)
```

Syntax of fabs()

```math.fabs(number)
```

Both will return the absolute value of number.

The difference is that math.fabs(number) will always return a floating point number even if the argument is integer, whereas abs() will return a floating point or an integer depending upon the argument.

In case the argument is a complex number, abs() will return the magnitude part where as fabs() will return an error.

To use the fabs() function we need to import the library “math”.

 `# Python code to demonstrate working``# of fabs() and abs()``import` `math`` ` `#################################``# When the argument is an integer#``################################# ``number ``=` `-``10`` ` `# abs() will return an integer as``# the argument is an integer``print``(``abs``(number))`` ` `# fabs() will return a floating point number``print``(math.fabs(number))`` ` `###########################################``# When the input is a floating point number#``########################################### ``number ``=` `-``12.08`` ` `# abs() will return an floating point number``# as the argument is a floating point number``print``(``abs``(number))`` ` `# fabs() will return a floating point number``print``(math.fabs(number))`` ` `####################################``# When the input is a complex number#``#################################### ``number ``=` `complex``(``3``, ``4``)`` ` `# abs() will return the magnitude``print``(``abs``(number))`` ` `# fabs() will return an error``# print(math.fabs(number))`

Output:

```10
10.0
12.08
12.08
5.0
```

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