CODEWITHSUNDEEP
python-3.x
waspzulu
waspzulu

Reputation: 13

Problem with the output of an exponential calculation

I tried to calculate an exponential calculation, I tried both ways, writing it with the normal ** operator and the pow() function.

If I directly use numbers, everything works completely fine. But as soon as I use variables which get their value from input() functions the result is rounded, although I use the float argument.

I am quite new to coding, so please don't go to hard on me.

Code below:

pow(1.05,5), everything fine, result is 1.2762815625 and so on
float(pow(int(a),int(b)) the result is just 1.0, although it should be the same as above.

Upvotes: 1

Views: 91

Answers (2)

Anonymous Coder
Anonymous Coder

Reputation: 586

it is because you are doing the power operation on int i.e first you are converting the 1.05 to 1 by doing int(1.05) and then calculating the power(). you need to apply pow() on float()

print(float(pow(float(1.05),float(5))))

or either

print(pow(float(1.05),float(5)))

Upvotes: 2

10 Rep
10 Rep

Reputation: 2270

The reason the float function returns 1.0 is because of how it deals with integers.

For example: 

integer = 5.5236734
print(float(integer))

The above code's output will be:

5.5236734

Now lets say you make some changes: 

integer = 5.5236734
print(int(integer))

First, we made integer a decimal number, and then we said to print the int() form of the decimal.

This will be the result:

5

So, to fix your code, you just need to do this: 

a = 1.05
b = 5
print(float(pow(a, b)))

Which will output: 

1.2762815625000004

Hope this helps!

Upvotes: 1

Related Questions