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Python | math.copysign() function
• Last Updated : 11 Mar, 2019

In Python, math module contains a number of mathematical operations, which can be performed with ease using the module. `math.copysign(a, b)` function return a float with the magnitude (absolute value) of a but the sign of b.

```Syntax: math.copysign(a, b)

Parameter:
a, b: numeric values.

Returns:  Return absolute value of a but the sign of b.```

Code #1:

 `# Python code to demonstrate the working of copysign()``   ` `# importing "math" for mathematical operations ``import` `math ``   ` `a ``=` `5.2``b ``=` `-``25``   ` `# returning the copysign ``print` `(``"The copysign of 5.2 and -25 is : "``, end ``=``"") ``print` `(math.copysign(a, b))`
Output:
```The copysign of 5.2 and -25 is : -5.2
```

Code #2:

 `# Python code to demonstrate the working of factorial()`` ` `# importing "math" for mathematical operations ``import` `math `` ` `# returning the copysign``print` `(math.copysign(``-``13``, ``25.5``))``print` `(math.copysign(``2.87``, ``-``15``))`
Output:
```13.0
-2.87
```

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