Python Program to Print G Star Pattern

This article shows how to write a Python program to print the Alphabet G star pattern using the for loop, while loop, and functions with an example. 

The below alphabet G star pattern example accepts the user-entered rows, and the nested for loop iterates the rows. The elif condition is to print stars at a few positions to get the Alphabet G pattern of stars and skip others.

rows = int(input("Enter Alphabet G of Stars Rows = "))
print("====The Alphabet G Star Pattern====")

for i in range(rows):
    for j in range(2 * rows):
        if (i == 0 or i == rows - 1) and (j == 0 or j == (2 * rows) - 2):
            print(end=" ")
        elif j == 0 or (i == 0 and j <= rows) or (i == rows // 2 and j > rows // 2) or \
                (i > rows // 2 and j == (2 * rows) - 1) or (i == rows - 1 and j < 2 * rows):
            print("*", end="")
        else:
            print(end=" ")
    print()

Enter Alphabet G of Stars Rows = 9
====The Alphabet G Star Pattern====
 *********        
*                 
*                 
*                 
*    *************
*                *
*                *
*                *
 *************** *

The above Python code prints the Alphabet G pattern of stars; the code below is another version with an incline.

rows = int(input("Enter Alphabet G of Stars Rows = "))
print("====The Alphabet G Star Pattern====")

for i in range(rows):
    for j in range((2 * rows) - 1):
        if (i == 0 or i == rows - 1) and (j == 0 or j == (2 * rows) - 3):
            print(end=" ")
        elif j == 0 or (i == 0 and j <= rows) or (i == rows // 2 and j > rows // 2) or \
                (i > rows // 2 and j == (2 * rows) - 3) or (i == rows - 1 and j < (2 * rows) - 2):
            print("*", end="")
        else:
            print(end=" ")
    print()

Python program to print the Alphabet G Star pattern using while loop

Instead of a for loop, this program uses the while loop to iterate the alphabetic G pattern rows and prints the stars at each position. For more Star Pattern programs >> Click Here.

rows = int(input("Enter Alphabet G of Stars Rows = "))

n = rows // 2
m = 2 * rows
i = 0
while i < rows:
    j = 0
    while j < m - 1:
        if (i == 0 or i == rows - 1) and (j == 0 or j == m - 3):
            print(end=" ")
        elif j == 0 or (i == 0 and j <= rows) or (i == n and j > n) or \
                (i > n and j == m - 3) or (i == rows - 1 and j < m - 2):
            print("*", end="")
        else:
            print(end=" ")
        j = j + 1
    print()
    i = i + 1

Enter Alphabet G of Stars Rows = 13
 *************           
*                        
*                        
*                        
*                        
*                        
*      ******************
*                      * 
*                      * 
*                      * 
*                      * 
*                      * 
 ********************** 

In this Python example, we created a GPattern function that accepts the rows and the symbol or character to print the Alphabet G pattern of the given symbol.

def GPattern(rows, ch):
    m = 2 * rows
    n = rows // 2
    for i in range(rows):
        for j in range(2 * rows):
            if (i == 0 or i == rows - 1) and (j == 0 or j == m - 2):
                print(end=" ")
            elif j == 0 or (i == 0 and j <= rows) or (i == n and j > n) or \
                    (i > n and j == m - 1) or (i == rows - 1 and j < m):
                print('%c' %ch, end='')
            else:
                print(end=" ")
        print()


row = int(input("Enter Alphabet G of Stars Rows = "))
sy = input("Symbol for G Star Pattern = ")
GPattern(row, sy)

Enter Alphabet G of Stars Rows = 11
Symbol for G Star Pattern = $
 $$$$$$$$$$$          
$                     
$                     
$                     
$                     
$     $$$$$$$$$$$$$$$$
$                    $
$                    $
$                    $
$                    $
 $$$$$$$$$$$$$$$$$$$ $