How to find the power of a number in Python
pow() function
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Import the math module as shown below in your Python environment.
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Use the pre-defined
math.pow(number,exponent)function to find the power of the number.
import mathprint(math.pow(4,2))
Iterative approach
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Define the function, which takes two arguments:
- number
- exponent/power
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Find the power of a number: multiply the number with itself the same number of times as the exponent’s value. We use the for…loop to achieve this task and store the result in the res variable.
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Return the result stored in res, which is the required power of a number.
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Finally, display the output.
def power(n,e):res=1for i in range(e):res *= nreturn resprint(power(4,2))
Recursive approach
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Define the function, which takes two arguments:
- number
- exponent/power
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If the exponent/power is 0, then return 1.
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If the exponent/power is 1 then return n, i.e., the number itself.
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Otherwise, multiply the current number and call the
power(n,e)function recursively withe (exponent/power) decremented by 1 n*power(n, e-1) -
Finally, display the output, which is the desired power of the number.
def power(n, e):if e == 0:return 1elif e == 1:return nelse:return (n*power(n, e-1))n = 4p = 2print(power(n, p))
