Python: Implement pow(x, n)

Last update on August 09 2022 03:30:44 (UTC/GMT +8 hours)

Python Class: Exercise-7 with Solution

Write a Python class to implement pow(x, n).

Sample Solution:

Python Code:

class py_solution:
   def pow(self, x, n):
        if x==0 or x==1 or n==1:
            return x 

        if x==-1:
            if n%2 ==0:
                return 1
            else:
                return -1
        if n==0:
            return 1
        if n<0:
            return 1/self.pow(x,-n)
        val = self.pow(x,n//2)
        if n%2 ==0:
            return val*val
        return val*val*x

print(py_solution().pow(2, -3));
print(py_solution().pow(3, 5));
print(py_solution().pow(100, 0));

Sample Output:

0.125                                                                                                         
243                                                                                                           
1

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Previous: Write a Python class to find the three elements that sum to zero from a set (array) of n real numbers.
Next: Write a Python class to reverse a string word by word.

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Python: Tips of the Day

The Zip() Function:

>>> students = ('John', 'Mary', 'Mike')
>>> ages = (15, 17, 16)
>>> scores = (90, 88, 82, 17, 14)
>>> for student, age, score in zip(students, ages, scores):
...     print(f'{student}, age: {age}, score: {score}')
... 
John, age: 15, score: 90
Mary, age: 17, score: 88
Mike, age: 16, score: 82
>>> zipped = zip(students, ages, scores)
>>> a, b, c = zip(*zipped)
>>> print(b)
(15, 17, 16)