How do I right a simple python code to print Fibonacci number up say 21?

Question

Fibonacci program

Answer 1

Here is my python code:

https://code.sololearn.com/cRdvpVrWwP57/?ref=app

Answer 2

https://code.sololearn.com/cbfGtdkZiI5s/?ref=app

Answer 3

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# 1 Prints array of fibonacci items:

def fibo(n):
a, b, arr = 0, 1, []
while b <= n:
arr.append(b)
a, b = b, a + b
return arr
print fibo(21)

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# 2 This one is more basic. Prints numbers each one in the next line

def fibo(n):
a, b = 0, 1
while b <= n:
print b
a, b = b, a + b
fibo(21)