# File: rfib.py
# Program to compute the first n numbers of the Fibonacci series recursively
#
# Matt Bishop, MHI 289I, Fall 2021

#
# get the nth Fibonacci number
#
def fib(n):
    # base cases: f0 = 0, f1 = 1
    if n == 0:
        return 0
    elif n == 1:
        return 1
    # recursion: fn = fn-1 + fn-2
    return fib(n-1) + fib(n-2)

#
# main routine
#
# input number
try:
    n = int(input("Fibonacci sequence from f0 to f: "))
except:
    print("Need an integer")
else:
    # it better be non-negative!
    if n < 0:
        print("Need a non-negative integer")
    else:
        # compute the sequence and print the terms
        for i in range(n+1):
            # get next Fibonacci number and
            # announce it
            print("Fibonacci number", i, "is", fib(i))