Python Pattern Program

Python programming language is quite easy to learn. The implementation of various libraries with the ease of syntax makes it stand out, one of the many reasons why it has become the most popular programming language in this decade. While the learning part is easy, the interviewers often seek your approach in building the logic for pattern programs. As tricky as it may sound, with python it is a piece of cake. 

Pattern programs are a popular programming exercise to improve your coding skills and understanding of loops and nested loops. In this blog, we’ll take a look at some of the most common pattern programs in Python and how to implement them.

Explain Various pattern programmes in python

Star Pattern Programs:

A Star Pattern Program involves printing a set of stars in a specific shape, such as a triangle, rectangle, or a diamond. Some examples of Star Pattern Programs in Python include:

Pyramid Pattern Program:

This program involves printing a pyramid-like structure using stars, where the number of stars in each row increases and then decreases.

Half-Pyramid Pattern Program:

This program involves printing half of a pyramid, where the number of stars in each row increases.

Diamond Shaped Pattern Program:

This program involves printing a diamond-shaped pattern of stars, where the number of stars in each row starts with one in the middle row and increases as it moves away from the middle.

Hourglass Pattern Program:

This program involves printing an hourglass-shaped pattern of stars, where the number of stars in each row starts with a maximum number in the middle row and decreases as it moves away from the middle.

How Can You Print a Pattern in Python?

To print a pattern in Python, you can use loops (for or while) and conditional statements (if/else) along with print statements to achieve the desired output. Here’s a simple example of how to print a half-pyramid pattern of stars in Python:

python
# number of rows in the pattern
rows = 5# loop to print each rowfor i in range(0, rows):
    # loop to print stars in each rowfor j in range(0, i + 1):
        print("*", end="")
    # move to the next line after printing stars in each rowprint("")

This code uses two nested for loops. The outer loop iterates rows number of times to print each row, and the inner loop prints stars in each row. The end parameter in the print statement is set to an empty string, which means the next print statement will be on the same line. The print("") statement after the inner loop moves the cursor to the next line, effectively creating a pyramid-like pattern of stars.

Triangle pattern:

This pattern involves printing a triangle of asterisks or any other character.

python
# Triangle patternfor i in range(1, 6):
    for j in range(1, i+1):
        print("*", end="")
    print()

Output:

markdown
*
**
***
****
*****

Pyramid pattern:

This pattern involves printing a pyramid of asterisks or any other character.

python
# Pyramid patternfor i in range(1, 6):
    for j in range(1, 6-i):
        print(" ", end="")
    for k in range(1, i+1):
        print("*", end="")
    print()

Output:

markdown
    ****
  *****
 *******
*********

Diamond pattern:

This pattern involves printing a diamond shape of asterisks or any other character.

python
# Diamond patternfor i in range(1, 6):
    for j in range(1, 6-i):
        print(" ", end="")
    for k in range(1, 2*i):
        print("*", end="")
    print()
for i in range(4, 0, -1):
    for j in range(1, 6-i):
        print(" ", end="")
    for k in range(1, 2*i):
        print("*", end="")
    print()

Output:

markdown
    ****
  *****
 *******
*********
 *******
  *****
   ***
    *

These are just a few examples of the pattern programs you can write in Python. By practicing these programs and variations of them, you can improve your coding skills and become more confident in working with loops and nested loops.

Explain Number Pattern Programs

Number Pattern Programs:

A Number Pattern Program involves printing a set of numbers in a specific shape, such as a triangle, pyramid, or diamond.

Some examples of Number Pattern Programs in Python include:

1. Simple Numbers in a Pyramid:

This program involves printing a pyramid-like structure of numbers, where the numbers in each row increase from left to right.

2. Pascal’s Triangle Pattern:

This program involves printing Pascal’s Triangle, a triangular array of binomial coefficients, where each number is the sum of the two numbers above it.

3. Diamond Pattern Program:

This program involves printing a diamond-shaped pattern of numbers, where the numbers in each row start with one in the middle row and increase as it moves away from the middle.

What are Python Functions?

A function is a reusable, ordered code block that may be used to repeat a single action several times. Functions make it simple to reuse code and to increase modularity, as well as to keep the application code up to date. Python allows users to write their own functions while also providing built-in functions such as ascii(), print(), etc.

Four types of Python functions –

• Function with no arguments but with a return value
• Function with both arguments and return value
• Function with no argument and no return value
• Function with an argument but no return value

What Are the Different Types of Design Patterns Being Used in Python?

In Python, patterns are utilized to emphasize code readability and execute various tasks through the use of significant indentation. With the help of design patterns, programmers may build clear and logical code for both small and large projects. These design patterns are used in many enterprise development software. By obtaining a thorough clarity of these design patterns, an application can be as basic as possible while simultaneously making the code more understandable.

With the help of these design patterns, programmers may build clear and logical code for both small and large projects. The three different design patterns in Python include:

• Behavioral Patterns
• Creational Patterns
• Structural Patterns

let’s continue exploring pattern programs in Python.

Floyds triangle pattern:

This pattern involves printing numbers in a triangle shape, with each row having one more number than the previous row.

python
# Floyds triangle pattern
num = 1for i in range(1, 6):
    for j in range(1, i+1):
        print(num, end=" ")
        num += 1print()

Output:

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

Mirror image pyramid pattern:

This pattern involves printing a pyramid of asterisks or any other character, with the bottom half of the pyramid being a mirror image of the top half.

scss
# Mirror image pyramid pattern
for i in range(1, 6):
    for j in range(1, 6-i):
        print(" ", end="")
    for k in range(1, i+1):
        print("*", end="")
    for l in range(1, i):
        print("*", end="")
    print()
for i in range(4, 0, -1):
    for j in range(1, 6-i):
        print(" ", end="")
    for k in range(1, i+1):
        print("*", end="")
    for l in range(1, i):
        print("*", end="")
    print()

Output:

markdown
    ****
  *****
 *******
*********
 *******
  *****
   ***
    *

Inverted triangle pattern:

This pattern involves printing a triangle of asterisks or any other character, with the rows getting longer from top to bottom.

python
# Inverted triangle patternfor i in range(5, 0, -1):
    for j in range(1, i+1):
        print("*", end="")
    print()

Output:

markdown
*****
*******
***

These are just a few more examples of the pattern programs you can write in Python. By practicing these programs and variations of them, you can continue to improve your coding skills and become more confident in working with loops and nested loops.

Explain Characters Patter Programs

Character Pattern Programs:

A Character Pattern Program involves printing a set of characters in a specific shape, such as a triangle, pyramid, or diamond.

Some examples of Character Pattern Programs in Python include:

1. Alphabet Triangle:

This program involves printing a triangle-shaped pattern of alphabets, where the alphabets in each row start from “A” and increase in order.

2. Alphabet Diamond:

This program involves printing a diamond-shaped pattern of alphabets, where the alphabets in each row start with “A” in the middle row and increase as it moves away from the middle.

3. Alphabet Pyramid:

This program involves printing a pyramid-like structure of alphabets, where the alphabets in each row increase from left to right.

4. Number and Character Square:

This program involves printing a square-shaped pattern of numbers and characters, where each row contains alternating numbers and characters.

These programs make use of nested loops and conditional statements to create the desired pattern and are a good way to practice problem-solving skills in programming.

Conclusion:

In conclusion, pattern programs are a great way to improve your coding skills in Python. They help you understand the basics of loops and nested loops, and enable you to practice your skills in a fun and creative way. Whether you’re a beginner or an experienced programmer, practicing pattern programs can help you take your coding skills to the next level.

It’s important to keep in mind that the examples provided here are just a starting point, and there are many other patterns you can create by modifying these programs or creating your own. The possibilities are endless, and the best way to improve is to keep practicing and experimenting with different patterns and variations.