How to write the Fibonacci Sequence?

Question

I had originally coded the program wrongly. Instead of returning the Fibonacci numbers between a range (ie. startNumber 1, endNumber 20 should = only those numbers between 1

Answer 1

Just for fun, in Python 3.8+ you can use an assignment expression (aka the walrus operator) in a list comprehension, e.g.:

>>> a, b = 0, 1
>>> [a, b] + [b := a + (a := b) for _ in range(8)]  # first 10 Fibonacci numbers
[0, 1, 1, 2, 3, 5, 8, 13, 21, 34]

An assignment expression allows you to assign a value to a variable and return it in the same expression. Therefore, the expression

b := a + (a := b)

is equivalent to executing

a, b = b, a + b

and returning the value of b.