Alphabet Pattern Programs in Python
Patterns are a valuable exercise for enhancing logical thinking and coding skills. Using loops in Python, we can create diverse alphabetical patterns like stars, squares, pyramids, and triangles. In this discussion, we’ll explore Python programs for printing these patterns using simple iteration and for loops. Before printing Python patterns, know ASCII: each alphabet corresponds to an ASCII value (e.g., A is 65). Uppercase (A-Z) values range from 65 to 90, and lowercase (a-z) from 97 to 122. Use `chr()` to print an alphabet via its ASCII value, like ‘A’ with ASCII 65.
What is an Alphabet Pattern?
An Alphabetic pattern is a visual arrangement of alphabets, whether uppercase or lowercase, presented in an aesthetically pleasing manner. These patterns can take on various predefined shapes such as squares, triangles, or even stars. Moreover, the customization of these patterns extends to choosing how they are filled.
Print Alphabet Pattern Programs in Python
Below are the Alphabet pattern programs in Python which we can print in Python.
Table of Content
- Left Triangle Alphabet Pattern
- Right Triangle Alphabet Pattern
- Hollow Triangle Alphabet Pattern
- Pyramid Alphabet Pattern
- Upside Down Pyramid Alphabet Pattern
- Hollow Pyramid Alphabet Pattern
- Diamond Alphabet Pattern
- Hourglass Alphabet Pattern
- Square Alphabet Pattern
- Heart Alphabet Pattern
- Right Pascal Alphabet Pattern
- Left Pascal Alphabet Pattern
Left Triangle Alphabet Pattern in Python
In this example, below Python code creates a function, `left_triangle_pattern`, to print a left-angled triangle of uppercase letters based on the specified number of rows. After defining the function, it sets the row count to 7 and calls the function to generate the desired pattern.
Python3
#define a function def left_triangle_pattern(rows): #goes to new lines for i in range (rows): #print characters in current line for j in range (i + 1 ): print ( chr (j + 65 ), end = "") print () #no of rows to span n = 7 #call the function left_triangle_pattern(n) |
A AB ABC ABCD ABCDE ABCDEF ABCDEFG
Space Complexity: O(1)
Time Complexity: O(n^2)
Right Triangle Alphabet Pattern in Python
In this example, below The Python code defines the function `right_triangle_pattern` to print a right-angled triangle of uppercase letters. It uses nested loops to manage line breaks, leading spaces, and character printing. The code sets the row count to 7 and calls the function to generate the pattern.
Python3
#define the function def right_triangle_pattern(rows): #changes lines for i in range (rows): #adds spaces for j in range ( 1 , rows - i): print ( " " , end = "") # prints characters for k in range (i + 1 ): print ( chr ( 65 + k), end = "") print () #rows to be spanned n = 7 #call the function right_triangle_pattern(n) |
A AB ABC ABCD ABCDE ABCDEF ABCDEFG
Space Complexity: O(1)
Time Complexity: O(n^2)
Hollow Triangle Alphabet Pattern in Python
In this example, below given Python code defines a function `hollow_left_triangle` to print a hollow left-angled triangle pattern of uppercase letters. It uses nested loops, with the outer loop managing lines and the inner loop controlling character printing, including spaces for the hollow effect. The code sets the number of rows to 7 .
Python3
#define function def hollow_left_triangle(rows): #change rows for i in range ( 1 , rows + 1 ): counter = 0 for j in range (i): # print characters at the end and start if j = = 0 or j = = i - 1 : print ( chr ( 65 + counter), end = '') counter + = 1 else : # print spaces in between if i ! = rows: print ( ' ' , end = '') # print characters in the last row else : print ( chr ( 65 + counter), end = '') counter + = 1 print () #rows to be spanned n = 7 #call the function hollow_left_triangle(n) |
A AB A B A B A B A B ABCDEFG
Space Complexity: O(1)
Time Complexity: O(n^2)
Pyramid Alphabet Pattern in Python
In this example, below Python code defines a function `pyramid_pattern` to print a pyramid pattern of uppercase letters. It utilizes nested loops, with the first loop managing spaces before each line, and the second loop controlling the printing of an odd number of characters. The code then sets the number of rows to 7.
Python3
#define the function def pyramid_pattern(rows): for i in range (rows): # prints spaces for j in range (rows - i - 1 ): print ( ' ' , end = '') # prints odd number of characters for k in range ( 2 * i + 1 ): print ( chr ( 65 + k), end = '') print () #rows to be spanned n = 7 #call the function pyramid_pattern(n) |
A ABC ABCDE ABCDEFG ABCDEFGHI ABCDEFGHIJK ABCDEFGHIJKLM
Space Complexity: O(1)
Time Complexity: O(n^2)
Upside Down Pyramid Alphabet Pattern in Python
In this example, below Python code defines a function `reverse_pyramid` to print a reversed pyramid pattern of uppercase letters. It uses nested loops, with the first loop managing spaces before each line, and the second loop controlling the printing of an odd number of characters. The code then sets the number of rows to 7 .
Python3
#define the function def reverse_pyramid(rows): for i in range (rows): # prints spaces for j in range (i): print ( ' ' , end = '') # prints an odd number of characters in each row for j in range ( 2 * (rows - i) - 1 ): print ( chr ( 65 + j), end = '') print () #rows to be spanned n = 7 #call the function reverse_pyramid(n) |
ABCDEFGHIJKLM ABCDEFGHIJK ABCDEFGHI ABCDEFG ABCDE ABC A
Space Complexity: O(1)
Time Complexity: O(n^2)
Hollow Pyramid Alphabet Pattern in Python
In this example , below Python code defines a function `hollow_pyramid` to print a hollow pyramid pattern of uppercase letters. It uses nested loops, with the first loop managing spaces before each line, and the second loop controlling the printing of characters. The function includes conditions to print characters only at the start and end of each row, as well as in the last row for the hollow effect.
Python3
#define the function def hollow_pyramid(rows): for i in range (rows): #print spaces for j in range (rows - i - 1 ): print ( ' ' , end = '') #print characters counter = 0 for k in range ( 2 * i + 1 ): #print characters only in the start and end of row if k = = 0 or k = = 2 * i: print ( chr ( 65 + counter), end = '') counter + = 1 #print characters if it is the last row else : if i = = rows - 1 : print ( chr ( 65 + counter), end = '') counter + = 1 else : print ( ' ' , end = '') print () #rows to be spanned n = 7 #call the function hollow_pyramid(n) |
A A B A B A B A B A B ABCDEFGHIJKLM
Space Complexity: O(1)
Time Complexity: O(n^2)
Diamond Alphabet Pattern in Python
In this example, below Python code defines a function `print_diamond` to print either an upright or a reversed diamond pattern of uppercase letters, based on the `is_upright` parameter. It uses nested loops, with the first loop managing spaces before each line, and the second loop controlling the printing of characters. The code sets the number of rows to 7 and calls the function twice.
Python3
#define the function def print_diamond(rows, is_upright = True ): if is_upright: for i in range (rows): for j in range (rows - i - 1 ): print ( ' ' , end = '') for j in range ( 2 * i + 1 ): print ( chr ( 65 + j), end = '') print () else : for i in range (rows - 1 ): for j in range (i + 1 ): print ( ' ' , end = '') for j in range ( 2 * (rows - i - 1 ) - 1 ): print ( chr ( 65 + j), end = '') print () #rows to be spanned n = 7 #call the function to print upright triangle print_diamond(n, is_upright = True ) #call the function to print reverse triangle print_diamond(n, is_upright = False ) |
A ABC ABCDE ABCDEFG ABCDEFGHI ABCDEFGHIJK ABCDEFGHIJKLM ABCDEFGHIJK ABCDEFGHI ABCDEFG ABCDE ABC A
Space Complexity: O(1)
Time Complexity: O(n^2)
Hourglass Alphabet Pattern in Python
In this example, below Python code defines a function `print_hourglass` to print an hourglass pattern of uppercase letters. It combines a reversed pyramid pattern and an upright pyramid pattern. The function uses nested loops to manage spaces and character printing for both the upper and lower halves of the hourglass.
Python3
#define function def print_hourglass(rows): #print reverse pyramid for i in range (rows - 1 ): for j in range (i): print ( ' ' , end = '') for k in range ( 2 * (rows - i) - 1 ): print ( chr ( 65 + k), end = '') print () #print upright pyramid for i in range (rows): for j in range (rows - i - 1 ): print ( ' ' , end = '') for k in range ( 2 * i + 1 ): print ( chr ( 65 + k), end = '') print () #rows to be spanned n = 7 #call the function print_hourglass(n) |
ABCDEFGHIJKLM ABCDEFGHIJK ABCDEFGHI ABCDEFG ABCDE ABC A ABC ABCDE ABCDEFG ABCDEFGHI ABCDEFGHIJK ABCDEFGHIJKLM
Space Complexity: O(1)
Time Complexity: O(n^2)
Square Alphabet Pattern in Python
In this example , below Python code defines a function `print_square_pattern` to print a square pattern of uppercase letters. It uses nested loops, with the outer loop managing rows and the inner loop controlling the printing of characters.
Python3
#define the function def print_square_pattern(rows): #print rows for i in range (rows): #print characters in each row for j in range (rows): print ( chr ( 65 + i), end = " " ) print () #rows to be spanned n = 7 #call the function print_square_pattern(n) |
A A A A A A A B B B B B B B C C C C C C C D D D D D D D E E E E E E E F F F F F F F G G G G G G G
Space Complexity: O(1)
Time Complexity: O(n^2)
Heart Alphabet Pattern in Python
In this example, below Python code defines a function `print_heart_pattern` to print a heart-shaped pattern of uppercase letters. It consists of an upper part and a lower part. The upper part prints characters and spaces in a specific pattern, and the lower part prints characters in a descending order. The code sets the size of the heart based on the rows .
Python3
#define the function def print_heart_pattern(rows): #upper part of the heart for i in range (rows / / 2 , rows, 2 ): #prints spaces in the first half for j in range ( 1 , rows - i, 2 ): print ( " " , end = "") #prints alphabets in the first half for j in range (i): print ( chr ( 65 + j), end = "") #prints spaces in the second half for j in range ( 1 , rows - i + 1 , 1 ): print ( " " , end = "") #print alphabets in the second half for j in range (i): print ( chr ( 65 + j), end = "") print () #lower part of the heart for i in range (rows, 0 , - 1 ): for j in range (i, rows): print ( " " , end = "") for j in range (i * 2 ): print ( chr ( 65 + j), end = "") print () #size of the heart based on the rows in the lower part n = 10 #call the function print_heart_pattern(n) |
ABCDE ABCDE ABCDEFG ABCDEFG ABCDEFGHI ABCDEFGHI ABCDEFGHIJKLMNOPQRST ABCDEFGHIJKLMNOPQR ABCDEFGHIJKLMNOP ABCDEFGHIJKLMN ABCDEFGHIJKL ABCDEFGHIJ ABCDEFGH ABCDEF ...
Space Complexity: O(1)
Time Complexity: O(n^2)
Right Pascal Alphabet Pattern in Python
In this example, Below Python function `right_pascal_triangle` generates a right-angled Pascal’s Triangle pattern using uppercase letters. It consists of ascending and descending parts, printing spaces and characters in a specific pattern. The code sets the row count to 7 and calls the function to produce the pattern.
Python3
#define the function def right_pascal_triangle(rows): #prints ascending part for i in range ( 1 , rows + 1 ): #prints spaces print ( " " * (rows - i), end = "") #prints alphabets for j in range ( 1 , i + 1 ): print ( chr ( 64 + j), end = "") print () #prints descending part for i in range (rows - 1 , 0 , - 1 ): #prints spaces print ( " " * (rows - i), end = "") #prints alphabets for j in range ( 1 , i + 1 ): print ( chr ( 64 + j), end = "") print () #rows to be spanned n = 7 #call the function right_pascal_triangle(n) |
A AB ABC ABCD ABCDE ABCDEF ABCDEFG ABCDEF ABCDE ABCD ABC AB A
Space Complexity: O(1)
Time Complexity: O(n^2)
Left Pascal Alphabet Pattern in Python
In this example, below Python code defines a function `left_pascal` to print a left-angled Pascal’s Triangle pattern using uppercase letters. It consists of an ascending part and a descending part, with each part printing characters in a specific pattern. The code sets the number of rows to 7 and calls the function to generate the left-angled Pascal’s Triangle pattern.
Python3
#define the function def left_pascal(rows): #ascending part of the pattern for i in range ( 1 , rows + 1 ): for j in range ( 1 , i + 1 ): print ( chr ( 64 + j), end = "") print () #descending part of the pattern for i in range (rows - 1 , 0 , - 1 ): for j in range ( 1 , i + 1 ): print ( chr ( 64 + j), end = "") print () #rows to be spanend n = 7 #call the function left_pascal(n) |
A AB ABC ABCD ABCDE ABCDEF ABCDEFG ABCDEF ABCDE ABCD ABC AB A
Space Complexity: O(1)
Time Complexity: O(n^2)
Conclusion
In conclusion, exploring alphabet pattern programs in Python has provided a comprehensive insight into the versatility and creative potential of the language. From simple triangular patterns to intricate shapes, these programs serve as a practical and engaging way to enhance one’s understanding of Python’s loop structures and string manipulation capabilities. The ability to customize patterns by adjusting rows, columns, and repetition adds an extra layer of complexity, allowing learners to sharpen their programming skills.
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