Question

In GoogleCollab (Python)

• Write a function power(x,i) that takes an int i and a float (i.e. real number) x and returns xi, do not use Python’s in-built power function x**i , instead write a loop to do so using only multiplication.
• Now do use the power function x**i to write a second function unit_test(y) that tests whether your first function is working correctly or not.  
• Does power(x,i) work for any value of x and i ? For which values x and i does it throw an error? What happens if the input variables are letters instead of a float and an int?
• Write a new function power_2(x,i)so that instead of throwing an error, the function prints a message that explains what went wrong in each case?  

Answer 1

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Code:

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function power(x,i):

def power(x, i):

n = 1

for q in range(1, i+1):

n = x*n

return n

function unit_test(x,i):

def unit_test(x, i):

res1 = pow(x, i)

print(res1)

res2 = power(x, i)

print(res2)

if(res1 == res2):

print("Matching")

else:

print("Not matching")

It works fine with any value of x and i.

It throws an error when we try to enter any letter.

function power_2:

def power_2():

try:

x = float(input("Enter x:"))

i = int(input("Enter i:"))

unit_test(x, i)

except:

print("Please enter int and float values only")

Complete code:

def power(x, i):

n = 1

for q in range(1, i+1):

n = x*n

return n

def unit_test(x, i):

res1 = pow(x, i)

print(res1)

res2 = power(x, i)

print(res2)

if(res1 == res2):

print("Matching")

else:

print("Not matching")

def power_2():

try:

x = float(input("Enter x:"))

i = int(input("Enter i:"))

unit_test(x, i)

except:

print("Please enter int and float values only")

power_2()

Screenshot of code in colab:

output: