🐍 Python Pattern Challenge — Day 20

Pattern printing is a great way to strengthen your Python loops, spacing, repetition, and logical thinking. For Day 20, let's create a simple but interesting Star Hourglass Pattern ⭐.

This pattern starts with multiple stars, gradually narrows down to a single star, stays narrow for a few rows, and then expands again.

🎯 Today's Challenge

Write a Python program to print:

Best and cleanest code will be rewarded! 🏆

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Solution 1 — Using Two for Loops

n = 5


for i in range(n, 0, -1):
    print("  " * (n - i) + "* " * i)

for i in range(1, n + 1):
    print("  " * (n - i) + "* " * i)

How it works

The first loop creates the decreasing section:

* * * * *
 * * * *
  * * *
   * *
    *

The second loop creates the increasing section:

         *
       * *
      * * *
     * * * *
    * * * * *

Together, they form the hourglass-like pattern.

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Solution 2 — Matching the Exact Challenge Pattern

The image contains three single-star rows in the center.

n = 5

for i in range(n, 0, -1):
    print("  " * (n - i) + "* " * i)

for _ in range(2):
    print("  " * (n - 1) + "* ")

for i in range(2, n + 1):
    print("  " * (n - i) + "* " * i)

Output

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

This version matches the Day 20 challenge pattern more closely.

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Solution 3 — Using a Single Loop

n = 5

pattern = list(range(n, 0, -1)) + [1, 1] + list(range(2, n + 1))

for i in pattern:
    print("  " * (n - i) + "* " * i)

The pattern sequence is:

5, 4, 3, 2, 1, 1, 1, 2, 3, 4, 5

Each value determines how many stars appear on that row.

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⚡ Short & Clean Code

for i in [5, 4, 3, 2, 1, 1, 1, 2, 3, 4, 5]:
    print("  " * (5-i) + "* " * i)

🔥 Just one loop creates the complete pattern.

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🚀 Challenge Yourself

Can you modify this pattern:

• Take n from the user using input()?
• Create it using a while loop?
• Increase the number of center rows?
• Replace * with # or another symbol?
• Create a hollow version?
• Make the pattern wider or taller?

Drop your solution below! 👇

20 Days. 20 Patterns. Stronger Python Logic. 🐍🔥

Learn • Practice • Grow with CLCODING 🚀

Book:  107 Pattern Plots Using Python