🐍 Python Pattern Challenge — Day 31

 

🐍 Python Pattern Challenge — Day 31 | Hollow Diamond Star Pattern

Welcome to Day 31 of the Python Pattern Challenge! 🚀

Today, we're creating a beautiful Hollow Diamond Star Pattern using Python. This pattern combines stars and spaces to form a diamond shape with an empty center.

It's a great way to practice nested loops, conditional statements, spacing, and logical thinking while creating an attractive design using just a few lines of Python code.

🎯 Today's Challenge

Write a Python program to print exactly this pattern:

💻 Solution 1 — Using Nested for Loops

n = 4

for i in range(1, n + 1):
    for j in range(n - i):
        print(" ", end=" ")

    for j in range(2 * i - 1):
        print("*", end=" ")
    print()

for i in range(n - 1, 0, -1):
    for j in range(n - i):
        print(" ", end=" ")

    for j in range(2 * i - 1):
        print("*", end=" ")
    print()

This code creates a filled diamond pattern. To make it hollow, we need to add conditions that print stars only along the boundary and spaces inside.

🧠 Solution 2 — Creating a Hollow Diamond

n = 5



for i in range(-n + 1, n):
    for j in range(-n + 1, n):
        if abs(i) + abs(j) == n - 1:
            print("*", end=" ")
        else:
            print(" ", end=" ")
    print()

How It Works

1. Controlling the rows and columns

for i in range(-n + 1, n): 

    for j in range(-n + 1, n):

The outer loop controls the rows, while the inner loop controls the positions within each row.

2. Checking the diamond boundary

if abs(i) + abs(j) == n - 1:

The abs() function returns the absolute value of a number. This condition identifies positions along the diamond's boundary.

3. Printing stars and spaces

print("*", end=" ")

Stars appear on the boundary, while spaces are printed inside the shape.

⚡ What You Learn Today

• Using nested for loops

• Applying conditional statements

• Understanding the abs() function

• Controlling star positions with mathematical logic

• Creating symmetrical patterns using Python

🚀 Challenge Yourself

Can you modify today's pattern?

• Increase the diamond size.

• Replace * with # or @.

• Create a filled diamond.

• Print the pattern using a while loop.

• Take the size as user input.

• Create a hollow square using similar logic.

Share your solution in the comments! 👇

31 Days. 31 Patterns. Stronger Python Logic. 🐍🔥

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