🐍 Python Pattern Challenge — Day 5

Pattern printing is a great way to strengthen your Python logic, loops, conditions, and problem-solving skills. Today’s challenge is a little different — instead of printing a completely filled pyramid, we’ll create a hollow pyramid using stars.

Today's Challenge

Write a Python program to print:

Best and cleanest code will be rewarded! 🏆

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Solution 1 — Using a for Loop

n = 5

for i in range(n):
    spaces = "  " * (n - i - 1)

    if i == 0:
        print(spaces + "*")
    elif i == n - 1:
        print("* " * (2 * n - 1))
    else:
        print(spaces + "* " + "  " * (2 * i - 1) + "*")

How it works:

• " " * (n - i - 1) → creates the spaces before the stars.
• The first row contains only one star.
• The middle rows contain stars only at the two boundaries.
• The last row contains all stars.
• 2 * i - 1 controls the empty space inside the pyramid.

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Solution 2 — Using Nested Loops

n = 5

for i in range(n):
    spaces = "  " * (n - i - 1)

    if i == 0:
        print(spaces + "*")
    elif i == n - 1:
        print("* " * (2 * n - 1))
    else:
        print(spaces + "* " + "  " * (2 * i - 1) + "*")

How it works:

Here, the nested loops control the pattern step by step:

• First loop → creates the left indentation.
• Second loop → controls the pyramid width.
• j == 0 → prints the left boundary star.
• j == 2 * i → prints the right boundary star.
• i == n - 1 → fills the entire bottom row.

This approach is useful for understanding how conditions can control individual characters inside a pattern.

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Solution 3 — Using a Single for Loop

n = 5

for i in range(n):
    if i == 0:
        print(" " * (n - 1) * 2 + "*")
    elif i == n - 1:
        print("* " * (2 * n - 1))
    else:
        print("  " * (n - i - 1) + "* " + "  " * (2 * i - 1) + "*")

Here, each row is constructed dynamically using string multiplication and concatenation, without nested loops.

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🚀 Challenge Yourself

Can you create the same pattern:

• Using a while loop?
• Without using nested loops?
• By taking the number of rows using user input?
• Make it a hollow diamond instead of a pyramid?
• In the shortest possible Python code?

Drop your solution below! 👇

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