fibonacci.py

# Program to display the Fibonacci sequence up to n-th term

nterms = int(input("How many terms? "))

# first two terms
n1, n2 = 0, 1
count = 0

# check if the number of terms is valid
if nterms <= 0:
 print("Please enter a positive integer")
elif nterms == 1:
 print("Fibonacci sequence upto",nterms,":")
 print(n1)
else:
 print("Fibonacci sequence:")
 while count < nterms:
 print(n1)
 nth = n1 + n2
 # update values
 n1 = n2
 n2 = nth
 count += 1