Python Program to print pattern of Letter D

Hello everyone! Welcome back to programminginpython.com. I am continuing with this pattern programming series, here I will tell you how to print the pattern of the letter ‘D’. In the previous tutorials, I have shown you the pattern for the letter ‘C’, Letter A, and Letter B. Here it’s now time for Pattern D.

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Program on Github

You can also watch the video on YouTube here.

Task:

Python program to print the pattern of letter ‘D’

Approach:

  • Read an input integer for asking the size of the letter using  input()
  • Check if the entered number is greater than 8,
    • if yes, call the function print_pattern()
    • else, show a message to enter a number which is greater or equal to 8
  • print_pattern()
    • here we only do two things, print star(*) and print space( ), just writing conditions so the pattern of *‘s and ‘s will display the pattern ‘D’
    • following are 3 conditions for printing *’s
      We have 2 loops, outer loop() for rows and inner loop for columns.
    • # Outer for loop
          for row in range(n): 
        
              # Inner for loop 
              for column in range(n - 2):
      • Print first and last row
        • ((row == 0 or row == n-1) and (0 < column < n-3))
      • Print first column
        • column == 0
      • Print last column
        • column == n - 3 and (row != 0 and row != n - 1)
    • print   in remaining all cases.

Program on Github

Program:

__author__ = 'Avinash'


# Python3 program to print alphabet pattern D
def print_pattern(n):
  # Outer for loop for number of rows
  for row in range(n):

    # Inner for loop columns
    for column in range(n - 2):

      # prints first and last row
      if (
        ((row == 0 or row == n-1) and (0 < column < n-3)) or

        # prints first column
        column == 0 or

        # prints last column
        column == n - 3 and (row != 0 and row != n - 1)
      ):
        print("*", end=" ")
      else:
        print("  ", end="")
    print()

# Size of the letter
num = int(input("Enter the size \t"))

if num < 8:
  print("Enter a number atleast 8")
else:
  print_pattern(num)

Output:

Pattern D - Pattern Programming - programminginpython.com
Pattern D – Pattern Programming – programminginpython.com
Letter D - Pattern Programming - programminginpython.com
Pattern D – Pattern Programming – programminginpython.com

Print Pattern D – Code Visualization

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Program on Github

Feel free to look at other letters in this pattern series here https://www.youtube.com/playlist?list=PLrKr3rQwMgsiLQ__JeCz_Vvr5pbk6pILT

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