p2efficient.py

"""
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.
"""

def main():
	a = 0
	b = 1
	sum = 0
	temp = 0

	while (b<4000000):
		temp = b
		b = a+b
		a = temp
		if b%2 == 0:
			sum+=b
		z

	print("The answer to problem 2 is: " + str(sum) + ".")

if __name__ == "__main__":
	main()