Learn 25+ Important Pattern Programs in Python

Introduction

Patterns are an essential aspect of programming that can be both fun and challenging to work with. They are not only aesthetically pleasing but also serve as a valuable tool in enhancing your problem-solving skills and understanding of programming concepts. Python, being a versatile and popular programming language, provides various ways to create intricate patterns effortlessly. In this article, we will explore 20 of the most important pattern programs in Python, each designed to help you improve your coding skills.

Why Learn Pattern Programming?

Before we dive into the patterns themselves, let’s briefly discuss why learning pattern programming is valuable:

Problem-Solving Skills: Patterns often require a logical approach to problem-solving, teaching you how to break down complex problems into simpler, more manageable steps.
Algorithmic Thinking: Working with patterns helps you develop algorithmic thinking, a crucial skill for solving real-world problems in programming and beyond.
Coding Aesthetics: Patterns add a creative touch to your code, making it more visually appealing and easier to understand for you and others.
Interview Preparation: Many technical interviews for programming positions include pattern-related questions to assess candidates’ problem-solving abilities.
Building Confidence: Successfully creating patterns can boost your confidence in your coding skills.

Now, let’s explore some essential pattern programs in Python:

1. Square Pattern


n = 5
for i in range(n):
    for j in range(n):
        print("*", end=" ")
    print()

Output


* * * * * 
* * * * * 
* * * * * 
* * * * * 
* * * * *

2. Right Triangle Pattern


n = 5
for i in range(n):
    for j in range(i + 1):
        print("*", end=" ")
    print()

Output


* 
* * 
* * * 
* * * * 
* * * * *

3. Left Triangle Pattern


n = 5
for i in range(n):
    for j in range(n - i - 1):
        print(" ", end=" ")
    for j in range(i + 1):
        print("*", end=" ")
    print()

Output


        * 
      * * 
    * * * 
  * * * * 
* * * * *

4. Pyramid Pattern


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

Output


        * 
      * * * 
    * * * * * 
  * * * * * * * 
* * * * * * * * *

5. Reverse Pyramid Pattern


n = 5
for i in range(n, 0, -1):
    for j in range(0, n-i+1):
        print(" ",end='')
    for k in range(0, i):
        print("* ", end='')

    print("r")

Output


 * * * * * 
  * * * * 
   * * * 
    * * 
     *

6. Reverse Half Pyramid Pattern (Right-Sided)


n = 5
for i in range(n, 0, -1):
    for j in range(0, i):
        print("*", end='')
    print("r")

Output


*****
****
***
**
*

7. Reverse Half Pyramid Pattern (Left-Sided)


n = 5
for i in range(n, 0, -1):
    for j in range(0, n-i+1):
        print(" ",end='')
    for k in range(0, i):
        print("*", end='')

    print("r")

Output


 *****
  ****
   ***
    **
     *

8. Hollow Square Pattern


n = 5
for i in range(n):
    for j in range(n):
        if i == 0 or i == n - 1 or j == 0 or j == n - 1:
            print("*", end=" ")
        else:
            print(" ", end=" ")
    print()

Output


* * * * * 
*       * 
*       * 
*       * 
* * * * *

9. Diamond Pattern


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

Output


        * 
      * * * 
    * * * * * 
  * * * * * * * 
* * * * * * * * * 
  * * * * * * * 
    * * * * * 
      * * * 
        *

10. Half Diamond Pattern


n = 5
for i in range (1, n+1):
    for j in range (i):
        print("*", end="")
    print("r")

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

Output


*
**
***
****
*****
*****
****
***
**
*

11. Number Pattern 1


n = 5
num = 1
for i in range(n):
    for j in range(i + 1):
        print(num, end=" ")
        num += 1
    print()

Output


1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15

12. Number Pattern 2


n = 5
for i in range(1, n+1):
    for j in range(i):
        print(i, end=" ")
    print("r")

Output

13. Number Pattern 3


n = 5
for i in range(1, n+1):
    for j in range(1, i+1):
        print(j, end=" ")
    print("r")

Output

14. Reverse Number Pattern – Increment Order


n = 5
m = 0
for i in range(n, 0, -1):
    m += 1
    for j in range(0, i):
        print(m, end=" ")
    print("r")

Output

15. Reverse Number Pattern – Decrement Order


n = 5
for i in range(n, 0, -1):
    m = i
    for j in range(0, i):
        print(m, end=" ")
    print("r")

Output

16. Odd Number Pattern


n = 5
curr_num = 1
for i in range(1, n+1):
    for j in range(0, i):
        print(curr_num, end=" ")
        curr_num += 2
    print("r")

Output


1 
3 5 
7 9 11 
13 15 17 19 
21 23 25 27 29

17. Reverse Half Pyramid Pattern with Reverse Numbers


n = 5
for i in range(n, 0, -1):
    curr_num = i
    for j in range(0, i):
        print(curr_num, end=" ")
        curr_num -= 1
    print("r")

Output

18. Multiplication Number Pattern by Column


n = 5
for i in range(1, n+1):
    for j in range(1, i+1):
        print(i*j, end=" ")
    print("r")

Output


1 
2 4 
3 6 9 
4 8 12 16 
5 10 15 20 25

19. Palindrome Half Pyramid Pattern


n = 5
for i in range(1, n+1):
    for j in range(1, i+1):
        print(j, end=" ")
    for k in range(i-1, 0, -1):
        print(k, end=" ")
        
    print("r")

Output


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

20. Palindrome Full Pyramid Pattern


n = 5
for i in range(1, n+1):
    for j in range(1, n-i+1):
        print('', end=" ")

    '''Inner loop 2: for handling left side columns 
    of the middle number'''
    for k in range(1, i+1):
        print(k, end="")

    '''Inner loop 3: for handling right side columns 
    of the middle number'''
    for l in range(i-1, 0, -1):
        print(l, end="")
    print("r")

Output

21. Pascal’s Triangle


def generate_pascals_triangle(n):
    pascal_triangle = []
    for line in range(1, n + 1):
        current_line = []
        for i in range(line):
            if i == 0 or i == line - 1:
                current_line.append(1)
            else:
                current_line.append(pascal_triangle[line - 2][i - 1] 
                + pascal_triangle[line - 2][i])
        pascal_triangle.append(current_line)
    return pascal_triangle

n = 5
pascal_triangle = generate_pascals_triangle(n)
for line in pascal_triangle:
    print(" ".join(map(str, line)).center(n * 2))

Output

22. Alphabet Pattern


n = 5
for i in range(1, n+1):
    for j in range(i):
        print("A ", end="")
    print("r")

Output


A 
A A 
A A A 
A A A A 
A A A A A

23. Alphabet Pattern with Increment Order


n = 5
start_char = ord('A')
for i in range(n):
    for j in range(i + 1):
        print(chr(start_char), end=" ")
        start_char += 1
    print()

Output


A 
B C 
D E F 
G H I J 
K L M N O

24. Butterfly Pattern


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

Output


*                 * 
* *             * * 
* * *         * * * 
* * * *     * * * * 
* * * * * * * * * * 
* * * * * * * * * * 
* * * *     * * * * 
* * *         * * * 
* *             * * 
*                 *

25. Rhombus Pattern


n = 5
for i in range(n):
    for j in range(n - i - 1):
        print(" ", end=" ")
    for j in range(n):
        print("*", end=" ")
    print()

Output


       * * * * * 
      * * * * * 
    * * * * * 
  * * * * * 
* * * * *

26. Zigzag Pattern


n = 5
for i in range(n):
    for j in range(n):
        if i == j or (i + j == n - 1):
            print("*", end=" ")
        else:
            print(" ", end=" ")
    print()

Output

27. Heart Pattern


import math

def heart_pattern():
    for i in range(6):
        for j in range(7):
            if (i == 0 and j % 3 != 0) or 
            (i == 1 and j % 3 == 0) or 
            (i - j == 2) or (i + j == 8):
                print("*", end=" ")
            else:
                print(" ", end=" ")
        print()

heart_pattern()

Output


  * *   * *   
*     *     * 
*           * 
  *       *   
    *   *     
      *

28. Hourglass Pattern


n = 5
for i in range(n):
    for j in range(i):
        print(" ", end=" ")
    for j in range(2 * (n - i) - 1):
        print("*", end=" ")
    print()
for i in range(n - 2, -1, -1):
    for j in range(i):
        print(" ", end=" ")
    for j in range(2 * (n - i) - 1):
        print("*", end=" ")
    print()

Output


* * * * * * * * * 
  * * * * * * * 
    * * * * * 
      * * * 
        * 
      * * * 
    * * * * * 
  * * * * * * * 
* * * * * * * * *

Exercises

Exercise 1: Hollow Square Pattern

Write a Python program to print a hollow square pattern with a given number of rows (`n`). The pattern should have a solid border and an empty interior.

Sample Input/Output:


Input: n = 5
Output:
* * * * *
*       *
*       *
*       *
* * * * *

Exercise 2: Diamond Pattern

Create a Python program to print a diamond pattern with a given number of rows (`n`). The diamond should have a solid outline and be empty inside.

Sample Input/Output:


Input: n = 5
Output:
    *    
   * *   
  *   *  
 *     * 
*       *
 *     * 
  *   *  
   * *   
    *

Exercise 3: Pascal’s Triangle

Write a Python program to generate and print Pascal’s Triangle with a given number of rows (`n`).

Sample Input/Output:


Input: n = 5
Output:
    1    
   1 1   
  1 2 1  
 1 3 3 1 
1 4 6 4 1

Exercise 4: Number Pattern

Create a Python program to print a number pattern with a given number of rows (`n`). Start with the number 1 and increment it for each position in the pattern.

Sample Input/Output:


Input: n = 4
Output:
1
2 3
4 5 6
7 8 9 10

Exercise 5: Heart Pattern

Create a Python program to print an hourglass pattern with a given number of rows (`n`).

Sample Input/Output:


  *   *  
 * * * * 
*   *   *
*       *
 *     * 
  *   *  
   * *
    *

Conclusion

Learning and mastering pattern programming in Python is not only enjoyable but also an excellent way to sharpen your problem-solving skills, enhance your understanding of programming constructs, and boost your confidence as a coder. The patterns we’ve explored in this article are just the tip of the iceberg, and there are countless more patterns and variations waiting for you to explore. So, roll up your sleeves, fire up your Python interpreter, and start creating beautiful patterns to take your programming skills to the next level!