A sequence starts from 0 and 1 and every next number is a sum of previous two number ,its known as Fibonacci sequence or series.
n=int(input("Enter a number to print fabonacci series upto it:"))
a=0
b=1
print(a)
print(b)
c=0
while 1:
c=a+b
if c<n:
print(c)
a=b
b=c
