Add hollow_diamond_alphabet function for printing alphabet diamond patterns.

strings/hollow_diamond_alphabet.py

@@ -0,0 +1,83 @@
+def hollow_diamond_alphabet(n):
+    """
+    Prints a hollow diamond pattern using uppercase alphabet characters.
+
+    :param n: An integer representing the number of rows in the diamond.
+    :return: True if the pattern was successfully printed, False otherwise.
+    """
+    if not isinstance(n, int):
+        print("Error: Input must be an integer.")
+        return False
+
+    if n <= 0:
+        print("Error: Input must be a positive integer.")
+        return False
+
+    if n % 2 == 0:
+        print("Error: Input must be an odd integer.")
+        return False
+
+    # Calculate the number of rows for the upper half of the diamond
+    upper_rows = (n + 1) // 2
+
+    # Print the upper half of the diamond
+    for i in range(upper_rows):
+        char = chr(65 + i)  # Convert number to uppercase alphabet
+        if i == 0:
+            print(" " * (upper_rows - 1) + char)
+        else:
+            print(" " * (upper_rows - i - 1) + char + " " * (2 * i - 1) + char)
+
+    # Print the lower half of the diamond
+    for i in range(upper_rows - 2, -1, -1):
+        char = chr(65 + i)  # Convert number to uppercase alphabet
+        if i == 0:
+            print(" " * (upper_rows - 1) + char)
+        else:
+            print(" " * (upper_rows - i - 1) + char + " " * (2 * i - 1) + char)
+
+    return True
+
+
+def get_valid_input():
+    """
+    Prompts the user for input and validates it.
+
+    :return: A valid positive odd integer, or None if the user chooses to quit.
+    """
+    while True:
+        user_input = input(
+            "Enter the diamond size (positive odd integer) or 'q' to quit: "
+        )
+
+        if user_input.lower() == "q":
+            return None
+
+        try:
+            n = int(user_input)
+            if n > 0 and n % 2 != 0:
+                return n
+            elif n <= 0:
+                print("Error: Please enter a positive integer.")
+            else:
+                print("Error: Please enter an odd integer.")
+        except ValueError:
+            print("Error: Invalid input. Please enter a valid integer.")
+
+
+# Main program
+def main():
+    while True:
+        size = get_valid_input()
+        if size is None:
+            print("Thank you!")
+            break
+
+        if hollow_diamond_alphabet(size):
+            print("\nDiamond pattern printed successfully!")
+
+        print()  # Add a blank line for better readability
+
+
+if __name__ == "__main__":
+    main()