CODEWITHSUNDEEP
python
Jose Fernandex
Jose Fernandex

Reputation: 53

Can I reassign an integer within the code?

I'm doing a homework in Anaconda: My question is if can I reassign an integer, for example:

def vol(rad):
    for num in range(rad):
        num = 1  #I don't know if I'm doing fine assigning the number one or 
                 #should i do it other way.
        pi = 3.1416
        num += num ** 3 #trying to elevate the num integer to the 3rd potent
        rad = 3/4 * (num * pi)
    return rad

Once I run it, is just using the number one and I need to know the way to reassign it to use other values once running the function.
Hope you can understand my point and help me. Thanks in advance. The code is to calculate the volume of a sphere by the way.

Upvotes: 0

Views: 85

Answers (1)

Devesh Kumar Singh
Devesh Kumar Singh

Reputation: 20490

If you see your for loop, you have for num in range(rad):, which means that num variable will take values from 0 to rad-1, but if you do num=1 you will reassign that variable.
In addition, you are also reassigning the variable rad which you are using in your for loop range in rad = 3/4 * (num * pi)
Also num += num **3 means you are doing num = num + num**3, whereas I assume you should be doing num = num ** 3
If I understand correctly, and the commentors also pointed out, you need to calculate volume of the sphere with radius rad, you don't need a for loop for this, you can simply do

def vol(rad):

      pi = 3.1416

      #Take cube of radius
      rad = rad ** 3  # trying to elevate the num integer to the 3rd potent

      #Calculate volume
      volume = (4 / 3) * (rad * pi)

      return volume

Now the output will be

print(vol(4))
#268.0832
print(vol(8))
#2144.6656

As an extra tidbit, we already have a way to get value of pi using math.pi

In [18]: import math                                                                                                                                                                                                  

In [19]: print(math.pi)                                                                                                                                                                                               
3.141592653589793

Upvotes: 3

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