# Basic-256 ver 1.1.4
# iterative Fibonacci sequence
# Matches sequence A000045 in the OEIS, https://oeis.org/A000045/list

# Return the Nth Fibonacci number

input "N = ",f
limit = 500                        # set upper limit - can be changed, removed
f = int(f)
if f > limit then f = limit
a = 0 : b = 1 : c = 0 : n = 0      # initial values


while n < f
    print n + chr(9) + c   # chr(9) = tab
    a = b
    b = c
    c = a + b
    n += 1

end while

print " "
print n + chr(9) + c