🐍 Python Pattern Challenge — Day 22

Pattern printing is a great way to improve your Python loops, conditions, repetition, and logical thinking. For Day 22, let's try something different by combining numbers and stars in the same pattern.

🎯 Today's Challenge

Write a Python program to print:

The pattern alternates between numbers and *, making it simple but different from the usual star-only patterns.

Best and cleanest code will be rewarded! 🏆

---

Solution 1 — Using Nested Loops

for i in range(1, 7):
    for j in range(1, i + 1):
        if j % 2 == 1:
            print((j + 1) // 2, end=" ")
        else:
            print("*", end=" ")
    print()

How it works

The outer loop controls the number of rows:

for i in range(1, 7):

The inner loop controls how many elements are printed in each row:

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

Then we check whether the position is odd or even:

if j % 2 == 1:

Odd positions contain numbers:

1 2 3

Even positions contain stars:

* * *

---

Solution 2 — Using a Simple List

items = [1, "*", 2, "*", 3, "*"]

for i in range(1, len(items) + 1):
    print(*items[:i])

Output

1
1 *
1 * 2
1 * 2 *
1 * 2 * 3
1 * 2 * 3 *

This is a very clean approach because every row simply takes one more element from the list.

---

Solution 3 — Using a Function

def pattern(n):

    for i in range(1, n + 1):
        for j in range(1, i + 1):
            print(
                (j + 1) // 2 if j % 2 else "*",
                end=" "
            )
        print()


pattern(6)

Using a function makes the pattern reusable.

Try:

pattern(10)

to generate more rows.

---

⚡ Short & Clean Code

a = [1, "*", 2, "*", 3, "*"]

for i in range(1, 7):
    print(*a[:i])

🔥 Just a few lines are enough to create the complete pattern.

---

🚀 Challenge Yourself

Can you modify this pattern:

• Continue it up to 5 or 10 numbers?
• Replace * with #?
• Create the same pattern using a while loop?
• Reverse the pattern?
• Take the number of rows using input()?
• Create your own pattern by mixing numbers, letters, and symbols?

Drop your solution below! 👇

22 Days. 22 Patterns. Stronger Python Logic. 🐍🔥

Learn • Practice • Grow with CLCODING 🚀

Projects: 107 Pattern Plots Using Python

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🐍 Python Pattern Challenge — Day 21

Pattern printing is a great way to strengthen your Python loops, repetition, and logical thinking. For Day 21, let's keep things simple with a Growing Star Triangle ⭐.

🎯 Today's Challenge

Write a Python program to print exactly this pattern:

Can you create it with the cleanest Python code? 🏆

---

Solution 1 — Using a for Loop

for i in range(1, 11):
    print("* " * i)

How it works

The loop runs from 1 to 10.

On every iteration, i determines how many stars are printed:

"* " * i

So the number of stars increases row by row.

---

Solution 2 — Using a while Loop

i = 1

while i <= 10:
    print("* " * i)
    i += 1

Here, i starts at 1 and increases after every row until it reaches 10.

---

Solution 3 — Using a Function

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

star_pattern(10)

The function makes the pattern reusable.

For example:

star_pattern(5)

will create a smaller triangle.

---

⚡ Short & Clean Code

for i in range(1, 11): print("* " * i)

🔥 One line is enough to generate the complete pattern!

---

🚀 Challenge Yourself

Can you modify this pattern:

• Take the number of rows using input()?
• Print the pattern in reverse?
• Replace * with # or another character?
• Create the same pattern using nested loops?
• Make the triangle hollow?

Drop your solution below! 👇

21 Days. 21 Patterns. Stronger Python Logic. 🐍🔥

Learn • Practice • Grow with CLCODING 🚀

107 Pattern Plots Using Python

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🐍 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! 🏆

---

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.

---

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.

---

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.

---

⚡ 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.

---

🚀 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

Read More