loop-task3

import sys

num=input("Enter number:")
num=num.replace(",",".")
num=float(num)

fib = [0,1]
for ii in range(130):
    fib.append(fib[ii+1]+fib[ii])
#print(fib)

if num%1 != 0:
    print("Float")
    sys.exit()
elif num < 0:
    print("Negative")
else:
    if num in fib:
        fib.index(num)
        print("This is Fibonacci number")
    else:
        print("not Fibonacci")