def fibonacci(n):
    """

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.
"""
    a = 1
    b = 2
    total = 0
    for i in range(1, n):
        c = a + b
        a = b
        b = c
        if total < 4000000:
            if c % 2 == 0:
                total = total + c
    return total


result = fibonacci(100)
print(result)

