How do I properly use the Round() function in python?

Asked May 14 '21 at 04:10

Active May 14 '21 at 04:10

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So I am trying to use the built-in round function in Python but for some reason, the program runs properly sometimes and other times it doesn't

for i in range(0, inp):
    temp = restaurant.getEmployee() * random.randint(1, 5) * hours * average
    print(round(temp, 2))
    weekly += round(temp, 2)
    restaurant.changeMoney(round(temp, 2))

print("\nThe restaurant earned $" + str(weekly))
print("The restaurant has a total of $" + str(restaurant.getMoney()))

This is the result that I get:

3622.32
1448.93
724.46
1448.93
3622.32

The restaurant earned $10866.960000000001
The restaurant has a total of $11266.960000000001

Sometimes the code works properly and I get something along the lines of this:

3421.44
684.29
684.29
2737.15
3421.44

The restaurant earned $10948.61
The restaurant has a total of $11248.61

asked May 14 '21 at 04:10

venus

See https://stackoverflow.com/questions/588004/is-floating-point-math-broken – SuperStormer May 14 '21 at 04:13
3

Does this answer your question? [Limiting floats to two decimal points](https://stackoverflow.com/questions/455612/limiting-floats-to-two-decimal-points) – SuperStormer May 14 '21 at 04:14
1

If you're working with monetary amounts in dollars, then do all of your work in integer cents and convert only when you print. – Tim Roberts May 14 '21 at 04:48
2

either what Tim says^ or use `Decimal` instead of `float` – yedpodtrzitko May 14 '21 at 04:54

How do I properly use the Round() function in python?

0 Answers0