Yesterday’s challenge was about exceptions and today was a continuation on that topic but on a different aspect; raising an Exception.
Raising an exception is when one forces an exception to occur, it’s identified by the keyword raise followed by an exception instance or exception class then add a message to be displayed when the exception occurs. E.g. raise Exception(‘my message here’)
The Task:
Write a Calculator class with a single method: int power(int,int). The power method takes two integers, n and p, as parameters and returns the integer result of n^p. If either n or p is negative, then the method must throw an exception with the message: n and p should be non-negative.
class Calculator: def power(self,n,p): #check if either n or p is negative if n < 0 or p < 0: #raising the exception if either of the values is negative raise Exception('n and p should be non-negative') else: # returning the value of n to the power of p return n ** p cl1 = Calculator() T = int(input()) #number of test cases to be input #looping though every test case for i in range(T): #create two variables as the input is space-separated n, p = map(int, input().split()) try: ans = cl1.power(n,p) print(ans) except Exception as e: print(e) ''' Sample Input 4 3 5 2 4 -1 -2 -1 3 Sample Output 243 16 n and p should be non-negative n and p should be non-negative ''' 
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