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1. Print Line of N Stars Recursively2. Print Square of Stars Recursively3. Print Triangle (Top-Down) Recursively4. Print Triangle (Bottom-Up) Recursively5. Number Patterns Recursively6. Print Reverse Triangle Recursively7. Multiplication Table Recursively8. Increasing + Decreasing in One Function9. Sum Series with Steps Recursively10. Character Patterns Recursively

Print Triangle (Bottom-Up) Recursively

Print inverted triangle recursively.

IntermediatePhase 3 - Level 3: Pattern RecursionExample 4 of 10
print-triangle-bottom-up-recursively.py
1def print_stars(n):
2    if n == 0:
3        return
4    print("*", end="")
5    print_stars(n - 1)
6

7def print_triangle(n, row=1):
8    # Base case
9    if row > n:
10        return
11    
12    # Recurse first
13    print_triangle(n, row + 1)
14    # Then print current row
15    print_stars(row)
16    print()
17

18# Test
19n = int(input("Enter rows: "))
20print_triangle(n)

Output

Enter rows: 5
*****
****
***
**
*

What's going on

Recurse first, then print (reverse order).

Key Concepts:

Recurse before printing
Prints in reverse order
Creates inverted triangle

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