Added Python pattern solutions

PythonArrays/ArrayDeclaration.py

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+def arrayDeclare(n): 
+    arr = [0] * n 
+    for i in range(n):
+        num = int(input('Enter array element : ')) 
+        arr[i] = num 
+    print(arr[0])
+    print(arr[1])
+    print(arr[2])
+
+def main():
+    n = 3
+    arrayDeclare(n) 
+main()

PythonPatterns/PatternPart1/CharacterPattern.py

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+# Character Pyramid: Prints a half pyramid of consecutive letters starting from 'A'
+
+def character_pattern(n):
+
+    """
+    Prints a character pattern in the form of a half pyramid.
+
+    """
+    ch = ord('A')  # get ASCII code of 'A' 
+
+    # Outer loop for number of rows
+    for i in range(1, n + 1):
+
+        # Inner loop for printing characters in each row
+        for j in range(1, i + 1): 
+
+            print(chr(ch), end="")  # Convert ASCII to character and print
+            ch += 1                 # Move to the next character in sequence
+
+        print()                 # Print a newline after each row
+
+def main():
+    """
+    Main function to take user input and handle errors.
+    """
+
+    try:
+        # Take input from user
+        n = int(input("Enter Number : "))
+        character_pattern(n)
+
+    except ValueError:
+        # Handle non-integer inputs gracefully
+        print("Please enter a valid integer.")
+
+main() 
+
+
+'''
+Output-: 
+
+Enter Number : 4 
+A
+BC
+DEF
+GHIJ
+
+#Cross Check with Invalid Integer-:  
+
+Enter Number : g
+Please enter a valid integer.
+
+'''

PythonPatterns/PatternPart1/HalfPyramid.py

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+# Half Pyramid with Row Numbers: Prints a half pyramid where each row shows numbers from 1 to row number
+
+def half_pyramid(n):
+    """
+    Prints a half pyramid with numbers from 1 to the current row number in each row.
+    """
+
+    # Outer loop for rows
+    for i in range(1, n + 1):
+        # Inner loop for printing numbers in each row
+
+        for j in range(1, i + 1):
+            print(j, end="")  # Print numbers in the same line without space
+
+        print()  # Print newline after each row
+
+
+def main():
+    """
+    Main function to take user input and handle invalid cases.
+    """
+    try:
+        # Take integer input from user
+        n = int(input("Enter number : "))
+        half_pyramid(n)
+    except ValueError:
+        # Handle non-integer inputs gracefully
+        print("Please enter a valid integer.")
+
+
+# Program execution starts here
+main()
+
+'''
+
+Output -: 
+Enter number : 5
+1
+12
+123
+1234
+12345
+
+#Cross check with Invalid Value
+
+Enter number : #
+Please enter a valid integer.
+
+'''

PythonPatterns/PatternPart1/InvertedStar.py

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+# Inverted Star Pattern: Prints a half pyramid of stars in inverted order
+
+def inverted_star(n):
+    """
+    Prints an inverted star pattern.
+
+    """
+
+    # Outer loop for number of rows
+    for i in range(1, n + 1):
+
+        # Inner loop for printing stars in each row
+        for j in range(1, n - i + 2):
+            print("*", end="")  # Print star without newline
+
+        print()                # Print newline after each row
+
+
+def main():
+    """
+    Main function to take user input and handle invalid cases.
+    """
+
+    try:
+        # Take integer input from user
+        n = int(input("Enter number to print inverted star pattern: "))
+        inverted_star(n)
+
+    except ValueError:
+        # Handle non-integer inputs gracefully
+        print("Please enter a valid integer.")
+
+main()
+
+
+''' 
+
+output-: 
+
+Enter number to print inverted star pattern: 5
+*****
+****
+***
+**
+*
+
+#Cross check with Invalid Integer-: 
+Enter number to print inverted star pattern: @
+Please enter a valid integer.
+
+'''

PythonPatterns/PatternPart2/ButterFly.py

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+# Butterfly Pattern: Prints a symmetric butterfly-shaped star pattern
+
+def butterfly_pattern(n):
+    """ 
+    Prints a butterfly pattern of stars.
+
+    """
+    # Upper half of the butterfly
+    for i in range(1, n + 1):
+        # Print stars on left wing
+        for j in range(1, i + 1):
+            print("*", end="")
+        # Print spaces between wings
+        for j in range(1, 2 * (n - i) + 1):
+            print(" ", end="")
+        # Print stars on right wing
+        for j in range(1, i + 1):
+            print("*", end="")
+        print()  # Newline after each row
+
+    # Lower half of the butterfly
+    for i in range(n, 0, -1):
+        # Print stars on left wing
+        for j in range(1, i + 1):
+            print("*", end="")
+        # Print spaces between wings
+        for j in range(1, 2 * (n - i) + 1):
+            print(" ", end="")
+        # Print stars on right wing
+        for j in range(1, i + 1):
+            print("*", end="")
+        print()  # Newline after each row
+
+def main():
+    """
+    Main function to take user input and handle invalid cases.
+    """
+    try:
+        n = int(input("Enter number of rows for butterfly pattern: "))
+        butterfly_pattern(n)
+    except ValueError:
+        print("Please enter a valid integer.")
+
+# Program execution starts here
+main()
+
+
+'''
+Output-:
+
+Enter number of rows for butterfly pattern: 5
+*        *
+**      **
+***    ***
+****  ****
+**********
+**********
+****  ****
+***    ***
+**      **
+*        *
+
+
+# Cross check with Invalid Input
+
+Enter number of rows for butterfly pattern: g
+Please enter a valid integer.
+'''

PythonPatterns/PatternPart2/DiamondPattern.py

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+# Diamond Pattern: Prints a symmetric diamond-shaped star pattern
+
+def diamond_pattern(n):
+    # Upper triangle of the diamond
+    for i in range(1, n + 1):
+        # Print leading spaces
+        for j in range(1, n - i + 1):
+            print(" ", end="")
+        # Print stars
+        for j in range(1, 2 * i):
+            print("*", end="")
+        print()  # Newline after each row
+
+    # Lower triangle of the diamond
+    for i in range(n, 0, -1):
+        # Print leading spaces
+        for j in range(1, n - i + 1):
+            print(" ", end="")
+        # Print stars
+        for j in range(1, 2 * i):
+            print("*", end="")
+        print()  # Newline after each row
+
+
+def main():
+    """
+    Main function to take user input and handle invalid cases.
+    """
+    try:
+        n = int(input("Enter number of rows for diamond pattern: "))
+        diamond_pattern(n)
+    except ValueError:
+        print("Please enter a valid integer.")
+
+
+# Program execution starts here
+main()
+
+
+'''
+Output-: 
+
+    *
+   ***
+  *****
+ *******
+*********
+*********
+ *******
+  *****
+   ***
+    *
+
+# Cross check with Invalid Input
+
+Enter number of rows for diamond pattern: g
+Please enter a valid integer.
+
+'''

PythonPatterns/PatternPart2/FloydTriangle.py

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+## Floyd's Triangle: Prints a triangle where numbers continue across rows sequentially
+
+def Floyd_Trianngle(n):
+
+    """
+    Prints Floyd's Triangle: a half pyramid with numbers continuing sequentially across rows.
+    """
+
+    num = 1  # Initialize starting number
+
+    # Outer loop for rows
+    for i in range(1, n + 1):
+
+        # Inner loop for printing numbers in each row
+        for j in range(1, i + 1):
+
+            print(num, end=" ")   # Print number followed by a space
+            num+=1                # Increment number for next print
+
+        print()                  # Print newline after each row
+
+
+"""
+Main function to take user input and handle invalid input gracefully.
+"""
+def main():
+    try:
+        n = int(input("Enter number : "))
+        Floyd_Trianngle(n)
+    except ValueError:
+        print("Please enter a valid integer.")
+
+# Program execution starts here
+main()
+
+
+'''
+
+Output -: 
+Enter number : 5
+1 
+2 3 
+4 5 6 
+7 8 9 10 
+11 12 13 14 15 
+
+#Cross check with Invalid Value
+
+Enter number : #
+Please enter a valid integer.
+
+
+'''