I am trying to complete an assignment for my beginner's computer science. I have to write a program that proves that every even number greater than four is the sum of two prime numbers. I prompt the user for the top end of the range (the lowest being four) and then prove Goldbach's theory. However, I have to determine which numbers of the factoring are prime in another function. Here is what I have so far:
import sys def main(): print "This program will verify Goldbach's Conjecture from 4 to a number of your choosing." num = input("What should the top end of the range be? ") findPrimeAddends(num) def isPrime(n): for n in range(4,int(num**0.5)+1): if(num % n == 0): return False return True,0 def findPrimeAddends(num): for n in range(4, num + 1): x = n/2 (a,b) = isPrime(n) if(a > b): sys.stdout.write("%d = %d + %d\n" % (x,a,b)) main()
Right now, I keep getting an error because I haven't defined "num" in the isPrime function. Can anyone help me out?