Next
1. Print Numbers 1–1002. Print Even Numbers in Range3. Print Odd Numbers in Range4. Sum of Digits5. Reverse Digits of a Number6. Calculate Factorial (Loop)7. Fibonacci Series8. Palindrome Number Check9. Count Digits in a Number10. GCD of Two Numbers (Loop)11. LCM of Two Numbers (Loop)12. Print Prime Numbers in Range13. Count Prime Numbers in Range14. Check Composite Number15. Power of 2 Checker16. Print Number Pattern17. Print Star Pattern18. Armstrong Numbers in Range19. Strong Numbers in Range20. Sum of Series 1/1 + 1/2 + … + 1/N21. Print Multiplication Series22. Print Pyramid Pattern23. Print Inverted Pyramid Pattern24. Print Floyd's Triangle25. Print Pascal's Triangle

Fibonacci Series in Python

Print the first N terms of the Fibonacci sequence using a loop.

BeginnerLoop ProgramsExample 7 of 25
fibonacci-series.py
1# Program to print Fibonacci series up to N terms
2

3n = int(input("Enter number of terms: "))
4

5if n <= 0:
6    print("Please enter a positive integer.")
7else:
8    a, b = 0, 1
9    for _ in range(n):
10        print(a)
11        a, b = b, a + b

Output

Enter number of terms: 5
0
1
1
2
3

What's going on

We maintain two variables (a, b) representing consecutive Fibonacci numbers and update them each iteration.

After this program

If the idea is still fuzzy, read Day 9: Loops and Iteration in the Python course. For a short check, try the Python quiz (300 questions). Stay with all 25 loop programs, or see every topic on Python exercises.

PreviousCalculate Factorial (Loop)NextPalindrome Number Check