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What should print (-2 ** 2) return? According to my calculations it should be 4, but interpreter returns -4.
Is this Python's thing or my math is that terrible?
897
The pow() method takes three parameters: number - the base value that is raised to a certain power. power - the exponent value that raises number. modulus - (optional) divides the result of number paused to a power and finds the remainder: number^power % modulus.
The pow() function computes the power of a number. The pow() function takes two arguments (base value and power value) and, returns the power raised to the base number. For example, [Mathematics] xy = pow(x, y) [In programming] The pow() function is defined in math. h header file.
Given two numbers base and exponent, pow() function finds x raised to the power of y i.e. xy. Basically in C exponent value is calculated using the pow() function. pow() is function to get the power of a number, but we have to use #include<math. h> in c/c++ to use that pow() function.
pow() function is that the math function will always convert both numbers to a float. Because of this, the result of the function will always be a float.
According to docs, ** has higher precedence than -, thus your code is equivalent to -(2 ** 2). To get the desired result you could put -2 into parentheses
>>> (-2) ** 2
4
or use built-in pow function
>>> pow(-2, 2)
4
or math.pow function (returning float value)
>>> import math
>>> math.pow(-2, 2)
4.0
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