2A

n=int(input("Enter n value:"))
fib1=0
fib2=1
print("FIBONACCI SEQUENCE IS")
if n<=0:
    print("Enter a valid number")
elif n==1:
    print(fib1)
else:
    print(fib1,end=" ")
    print(fib2,end=" ")
    for i in range(3,n+1):
        fib3=fib1+fib2
        print(fib3,end=" ")
        fib1=fib2
        fib2=fib3