Python Program to print pattern of letter R

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 R. In the previous tutorials, I have shown you the patterns of letters A to Q. Here it’s now time for Pattern R. You can check the complete series on letter patterns here.

Program on Github

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Print Pattern R – Code Visualization

Task:

Python program to print the pattern of letter R

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 that 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 O
  • following are 5 conditions for printing *’s
    We have 2 loops, an outer loop() for rows, and an inner loop for columns.

    • # Outer for loop
      for row in range(n):
      
          # Inner for loop
          for column in range(n):

      • Print first row
        • row == 0 and column != 0 and column != n - 1
      • Print first column
        • column == 0 and row != 0
      • Print middle row
        • row == n//2 and column != n-1
      • Print last column
        • column == n-1 and row < n//2 and row != 0
      • Print R tail
        • row == column and row >= n//2
  • print   in remaining all cases.

Program on Github

Program:

__author__ = 'Avinash'

# Python3 program to print alphabet pattern R

#   * * * * * *
# *             *
# *             *
# *             *
# * * * * * * *
# *         *
# *           *
# *             *

def print_pattern(n):
    for row in range(n):
        for column in range(n):
            if (
                    # first row
                    (row == 0 and column != 0 and column != n - 1) or

                    # first column
                    (column == 0 and row != 0) or

                    # middle row
                    (row == n//2 and column != n-1) or

                    # last column
                    (column == n-1 and row < n//2 and row != 0) or

                    # R tail
                    (row == column and row >= n//2)
            ):
                print("*", end=" ")
            else:
                print(" ", end=" ")
        print()


size = int(input("Enter any size: \t"))

if size < 8:
    print("Enter a size minumin of 8")
else:
    print_pattern(size)

Output:

Program on Github