somgoozy - 9 months ago 52

Python Question

My professor gave us our first assignment (Cs315), which involves dealing with some huge (odd) integers and determining if they are prime. I started to do this in c++ until I realized that even long long ints could not hold the numbers needed, so I was left with the choices of making a class of vectors in c++, or learning python in a few days. This simple piece of Python code is supposed to spit out an odd 256 bit random number. It spits out random numbers, both even and odd, and I don't know why, but my guess is a that it is a simple syntactical error that I am not seeing.

`import random`

x = random.getrandbits(256)

if x % 2 == 0:

x + 1

print x

Answer

You need to assign `x + 1`

back to `x`

. You can either do this like this: `x = x+1`

or like this: `x += 1`

Source (Stackoverflow)