# Python math.copysign() – Copy Sign

Contents

## Python math.copysign()

math.copysign(x, y) function returns a float formed using the magnitude of x and sign of y.

If your platform supports signed zeroes, then the sign of -0.0 is also considered.

### Syntax

The syntax to call copysign() function is

``math.copysign(x, y)``

where

### Examples

Copy sign of y=-4 and magnitude (absolute value) of x=8.

Python Program

``````import math

x = 8
y = -4
result = math.copysign(x, y)
print('copysign(x, y) :', result)``````
Run

Output

``copysign(x, y) : -8.0``

x is negative and y is positive.

Python Program

``````
x = -8
y = 4
result = math.copysign(x, y)
print('copysign(x, y) :', result)``````
Run

Output

``copysign(x, y) : 8.0``

x is negative and y is negative.

Python Program

``````import math

x = -8
y = -4
result = math.copysign(x, y)
print('copysign(x, y) :', result)``````
Run

Output

``copysign(x, y) : -8.0``

x is positive and y is positive.

Python Program

``````import math

x = 8
y = 4
result = math.copysign(x, y)
print('copysign(x, y) :', result)``````
Run

Output

``copysign(x, y) : 8.0``

### Summary

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