Python Program to print pattern of letter J

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

Program on GitHub

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Print Pattern J – Code Visualization

Task:

Python program to print the pattern of the letter J

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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 J
  • following are 3 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 and last row
      ((rows == 0 or rows == n-1) and columns <= n//2)

      Print middle column
      (column == n //2)

  • print in remaining all cases.

Program on GitHub

Program:

__author__ = 'Avinash'


# Python3 program to print alphabet pattern J

'''
* * * * * * * * * 
        *         
        *         
        *         
        *         
        *         
        *         
        *         
* * * * *
'''



def print_pattern(n):
    # Outer for loop for number of rows
    for rows in range(n):
        # Inner for loop columns
        for columns in range(n):
            # prints first and last column
            if (rows == 0 or
                rows == n-1 and columns <= n//2 or
               # prints middle row
                (columns == n // 2)
            ):
                print("*", end=" ")
            else:
                print(" ", end=" ")
        print()

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

if size < 8:
    print("Enter a size greater than 8")
else:
    print_pattern(size)

Output:

Program on GitHub