_38_fibonacci_sequence.py

def fib(n):
    if n==1:
        print(0)
    elif n<0:
        print('negative not possible')
    else:
        x = 0
        y = 1
        for i in range(2,n):
            print(x)
            print(y)
            x=x+y
            y=y+x
        # print(x)
        # print(y)
        # for i in range(2,n):
        # c=x+y
        # x=y
        # y=c
        # print(c)

        

fib(-5)
fib(7)