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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

Print Floyd's Triangle in Python

Print Floyd's triangle (consecutive numbers in a right-angled triangle).

BeginnerLoop ProgramsExample 24 of 25
print-floyd-s-triangle.py
1# Program to print Floyd's triangle
2

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

5num = 1
6for i in range(1, rows + 1):
7    for j in range(i):
8        print(num, end=" ")
9        num += 1
10    print()

Output

Enter number of rows: 4
1 
2 3 
4 5 6 
7 8 9 10

What's going on

We keep a running counter and print increasing numbers row by row.

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.

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