4 – Best python program to print Fibonacci sequence

"""
Author : ITVoyagers (https://itvoyagers.in)

Date :21st December 2020

Description : Program to display the Fibonacci sequence up to n-th term where n is provided by the user.

"""
# change this value for a different result
#nterms = 10

# uncomment to take input from the user
nterms = int(input("How many terms? "))

# first two terms
n1 = 0
n2 = 1
count = 2

# 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 upto",nterms,":")
    print(n1,",",n2,end=', ')
    while count < nterms:
        nth = n1 + n2
        print(nth,end=' , ')
        # update values
        n1 = n2
        n2 = nth
        count += 1