Python Program to Print U Star Pattern

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

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

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

for i in range(rows):
    for j in range(rows):
        if (j == 0 or j == rows - 1) and i != rows - 1:
            print("*", end=" ")
        elif i == rows - 1 and j != 0 and j != rows - 1:
            print("*", end=" ")
        else:
            print(" ",end=" ")
    print()

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

Instead of a For loop, this program uses the while loop to iterate the Alphabet U pattern rows and prints the stars on the first row and middle column. For more Star Pattern programs >> Click Here. In this example, we removed extra spaces, squeezed U, and adjusted the code to get the boxy U.

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

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

Enter Alphabet U of Stars Rows = 10
*        *
*        *
*        *
*        *
*        *
*        *
*        *
*        *
*        *
**********

In this Python example, we created an UPattern function that accepts the rows and the symbol or character to print the Alphabet U pattern of the given symbol.

def UPattern(rows, ch):
    for i in range(rows):
        for j in range(rows):
            if (j == 0 or j == rows - 1) and i != rows - 1:
                print('%c' %ch, end=' ')
            elif i == rows - 1 and j != 0 and j != rows - 1:
                print('%c' %ch, end=' ')
            else:
                print(" ", end=" ")
        print()


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

Enter Alphabet U of Stars Rows = 13
Symbol for U Star Pattern = @
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
@                       @ 
  @ @ @ @ @ @ @ @ @ @ @