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math.pow

power/root

Raises x to the power of y and always returns a float. The difference from **: math.pow(-1, 0.5) raises ValueError, while ** gives a complex number.

Syntax

math.pow(x, y)

Both arguments are converted to float first, so large integers lose precision and math.pow(2, 10000) raises OverflowError, while 2 ** 10000 is computed exactly. Keep math.pow for real-valued math and use ** or the built-in pow() for integers — only the built-in accepts a third argument, the modulus, which is what modular exponentiation problems need.

Examples

import math
print(math.pow(2, 10))   # → 1024.0
print(math.pow(4, 0.5))  # → 2.0 (квадратный корень)
print(math.pow(3, 3))    # → 27.0
print(math.pow(2, -1))   # → 0.5
print(math.pow(0, 0))    # → 1.0
print(math.pow(10, 3))   # → 1000.0

See also

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