Python - 求斐波那契数列前N项之和
n = int(input("Input N: "))
a = 0
b = 1
sum = 0
for i in range(n):
sum += a
a, b = b, a + b
print("The sum of", n, "FIB is", sum,"!")
n = int(input("Input N: "))
a = 0
b = 1
sum = 0
for i in range(n):
sum += a
a, b = b, a + b
print("The sum of", n, "FIB is", sum,"!")