Recursive hollow pyramid Dry Run in PYTHON

Recursive hollow pyramid is an interactive PYTHON dry run visualizer from the Patterns programs section. Study the source code, then use the execution controls to follow each step, variable update, highlighted line, and console output.

This page provides a browser-based dry run with source-code highlighting, auto-scroll, voice narration controls, and execution output for learning the program step by step.

Recursive hollow pyramid Program Code

def hollow_pyr(n, i=1):
    if i > n: return
    for j in range(1, 2 * n):
        if j == n - i + 1 or j == n + i - 1 or i == n:
            print("*", end="")
        else:
            print(" ", end="")
    print()
    hollow_pyr(n, i + 1)
hollow_pyr(4)

View the complete Patterns programs page.