CODEWITHSUNDEEP
python-3.x
Chris Cheng
Chris Cheng

Reputation: 13

About the useage of python math.floor()

I used python math.floor() for calculations but found that it was different from what I thought more. The code is as follows:

import math
x=math.floor(-4.1)**math.floor(-3.1)**math.floor(2.1)
y=-5**-4**2
print(x,y)

Why are the operation results of x and Y are not the same?

Upvotes: 1

Views: 73

Answers (1)

orlp
orlp

Reputation: 117691

Because -a**n and (-a)**n are not the same. The first becomes -(a**n).

So when you write -5**... and math.floor(-4.1)**... they are not the same either.

If we fix this we get:

>>> x=math.floor(-4.1)**math.floor(-3.1)**math.floor(2.1)
>>> y=(-5)**(-4)**2
>>> print(x,y)
152587890625 152587890625

Upvotes: 3

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