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)
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.