🐍 Python Pattern Challenge — Day 13

Pattern printing is one of the best ways to improve your Python logic, loops, spacing control, and problem-solving skills. Today's challenge focuses on creating a beautiful Number Diamond Pattern, where the same number is repeated in each row, forming a symmetric diamond shape.

The pattern grows from 1 to 4 and then shrinks back to 1, making it a great exercise for understanding both increasing and decreasing sequences.

Today's Challenge

Write a Python program to print:

Best and cleanest code will be rewarded! 🏆

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Solution 1 — Using Nested Loops

n = 4

# Upper Half
for i in range(1, n + 1):

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

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

    print()

# Lower Half
for i in range(n - 1, 0, -1):

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

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

How it works

The upper half prints:

      1
     2 2
    3 3 3
   4 4 4 4
   
   
   
   

while the lower half prints:

  3 3 3
   2 2
    1

The first loop controls the spaces and the second loop prints the current number repeatedly.

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Solution 2 — Using String Multiplication

n = 4

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

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

How it works

" " * (n - i)

creates the leading spaces.

(str(i) + " ") * i

prints the number multiple times.

For example:

i = 3

produces:

3 3 3

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Solution 3 — Using a Single Loop

n = 4

rows = [1, 2, 3, 4, 3, 2, 1]

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

How it works

The list:

[1, 2, 3, 4, 3, 2, 1]

already contains the exact sequence needed for the diamond.

Each value controls:

• Number printed
• Number of repetitions
• Indentation of the row

This makes the code simple and easy to understand.

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⚡ Short & Clean Code

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

🔥 Just one loop generates the entire pattern.

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🚀 Challenge Yourself

Can you create:

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

Or try:

• Replacing numbers with letters
• Taking n from user input
• Creating a hollow diamond version
• Printing only even numbers
• Solving it using a while loop

Drop your solution below! 👇

13 Days. 13 Patterns. Stronger Python Logic. 🐍🔥

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