Python math.copysign() - Copy Sign

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.

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Syntax

The syntax to call copysign() function is

math.copysign(x, y)

where

Parameter	Required	Description
x	Yes	A float value.
y	Yes	A float value.

Examples

1. Copy magnitude (of positive number) and sign (of negative number)

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)

Output

copysign(x, y) : -8.0

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2. Copy magnitude (of negative number) and sign (of positive number)

x is negative and y is positive.

Python Program

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

Output

copysign(x, y) : 8.0

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3. Copy magnitude (of negative number) and sign (of negative number)

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)

Output

copysign(x, y) : -8.0

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4. Copy magnitude (of positive number) and sign (of positive number)

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)

Output

copysign(x, y) : 8.0

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Summary

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