🐍 Python Pattern Challenge — Day 26

 

🐍 Python Pattern Challenge — Day 26 | Binary Number Pattern

Python pattern printing is a fun way to improve your loops, number sequences, and logical thinking. For Day 26, let's try a simple but interesting pattern using only 1 and 0.

This pattern alternates between 1 and 0 in every row, creating a growing binary-style sequence.

🎯 Today's Challenge

Write a Python program to print the following pattern:

Can you create this pattern using the cleanest Python code? 🏆

Solution 1 — Using Nested for Loops

n = 6

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

    for j in range(i):
        print(1 if j % 2 == 0 else 0, end=" ")

    print()

How It Works

1. Controlling the rows

for i in range(1, n + 1):

This loop creates six rows, increasing the number of elements in each row.

2. Managing the spacing

print(" " * (n - i), end="")

This adds spaces before each row to give the pattern a pyramid-like appearance.

3. Alternating between 1 and 0

print(1 if j % 2 == 0 else 0, end=" ")

The condition checks whether the position j is even or odd.

If j is even, it prints 1.


If j is odd, it prints 0.

This creates the alternating sequence:

1 

1 0

 1 0 1

 1 0 1 0

Solution 2 — Using String Multiplication

for i in range(1, 7):
    row = " ".join(str(j % 2) for j in range(i))
    print(" " * (6 - i) + row.replace("0", "1", 1))

This approach is less straightforward because the replacement operation affects the first zero. For a reliable solution, prefer the nested-loop version above.

Solution 3 — Using a Function

def binary_pattern(n):
    for i in range(1, n + 1):
        row = []

        for j in range(i):
            row.append(str(1 if j % 2 == 0 else 0))

        print(" " * (n - i) + " ".join(row))


binary_pattern(6)

Using a function makes the pattern reusable. You can call binary_pattern(10) to print ten rows.

⚡ Short & Clean Code

for i in range(1, 7):
    print(" " * (6 - i), end="")
    print(*[1 if j % 2 == 0 else 0 for j in range(i)])

Just a few lines are enough to generate the complete pattern!

🚀 Challenge Yourself

Can you modify today's pattern?

• Start every row with 0 instead of 1.

• Print the pattern in reverse order.

• Create the same pattern using a while loop.

• Generate a left-aligned version without spaces.

• Take the number of rows using input().

• Try a pattern where each row alternates between 0 and 1, but starts with the opposite digit.

Share your solution in the comments! 👇

26 Days. 26 Patterns. Stronger Python Logic. 🐍🔥

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