Python Program to Print M Star Pattern

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

The below alphabet M star pattern example accepts the user-entered rows, and the nested for loop iterates the rows. The If else condition is to print stars at the first column and last row to get the Alphabetical M pattern of stars and skip others.

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

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

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

If you want the extra * for the odd numbers of the M pattern, use the code below on top of the for loop.

if rows % 2 != 0:
    rows += 1

This code is another version of writing the Alphabetical M pattern of stars.

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

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

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

Instead of a For loop, this program uses the while loop to iterate the Alphabet M pattern rows and prints the stars at the required positions. For more Star Pattern programs >> Click Here.

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

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

Enter Alphabet M of Stars Rows = 11
**         **
* *       * *
*  *     *  *
*   *   *   *
*    * *    *
*           *
*           *
*           *
*           *
*           *
*           *

In this Program example, we created an MPattern function that accepts the rows and the symbol or character to print the Alphabet M pattern of the given symbol.

def MPattern(rows, ch):
    for i in range(rows):
        print('%c' %ch, end='')
        for j in range(rows + 1):
            if j == rows or (j == i and j < rows // 2) or (j == rows - i - 1 and j > rows // 2):
                print('%c' %ch, end='')
            else:
                print(end=" ")
        print()


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

Enter Alphabet M of Stars Rows = 14
Symbol for M Star Pattern = $
$$            $$
$ $          $ $
$  $        $  $
$   $      $   $
$    $    $    $
$     $  $     $
$      $       $
$              $
$              $
$              $
$              $
$              $
$              $
$              $