🐍 Python Pattern Challenge — Day 6

Pattern printing is a great way to strengthen your Python logic, loops, conditions, and problem-solving skills. Today’s challenge is a fun one — we’ll create a Butterfly Pattern by controlling stars on both sides and the spaces between them.

Today's Challenge

Write a Python program to print:

 

Best and cleanest code will be rewarded! 🏆

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Solution 1 — Using for Loops

n = 5

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

for i in range(n - 1, 0, -1):
    print("*" * i + " " * (2 * (n - i) + 1) + "*" * i)

How it works:

• "*" * i → creates stars on the left and right.
• " " * (2 * (n - i) + 1) → creates the gap between the two sides.
• The first loop makes the butterfly grow.
• The second loop makes it shrink.
• The star count follows:

1 → 2 → 3 → 4 → 5 

5 → 4 → 3 → 2 → 1

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Solution 2 — Using Nested Loops

n = 5

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

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

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

    print()

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

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

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

    print()

How it works:

The pattern is divided into three parts:

• First loop → prints the left wing.
• Second loop → creates the middle gap.
• Third loop → prints the right wing.

The outer loops control the increasing and decreasing rows.

This approach is useful for beginners because it clearly demonstrates how nested loops control different sections of a pattern.

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Solution 3 — Using a Single Loop

n = 5 for i in list(range(1, n + 1)) + list(range(n - 1, 0, -1)): print("*" * i + " " * (2 * (n - i) + 1) + "*" * i)

How it works:

Instead of writing two separate loops, we create one sequence:

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

Each value of i controls:

•  Stars on the left
•  Spaces in the middle
•  Stars on the right

This makes the solution shorter and more reusable.

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 Short & Clean Code

for i in range(1, 6):
    print("*"*i + " "*(11-2*i) + "*"*i)

for i in range(4, 0, -1):
    print("*"*i + " "*(11-2*i) + "*"*i)

 Just two loops are enough to create the complete butterfly pattern.

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Challenge Yourself

Can you modify this pattern:

• Replace * with numbers?
• Create a hollow butterfly?
• Use a while loop?
• Take the value of n using user input?
• Create the entire pattern using only one loop?
• Write the shortest possible Python code?

Drop your solution below! 👇

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