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Programs for printing pyramid patterns in Python

Patterns can be printed in python using simple for loops. First outer loop is used to handle number of rows and Inner nested loop is used to handle the number of columns. Manipulating the print statements, different number patterns, alphabet patterns or star patterns can be printed.
Some of the Patterns are shown in this article.

  • Simple pyramid pattern

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern
    def pypart(n):
          
        # outer loop to handle number of rows
        # n in this case
        for i in range(0, n):
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing stars
                print("* ",end="")
           
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    pypart(n)

    Output:

    * 
    * * 
    * * * 
    * * * * 
    * * * * * 
    

    Another Approach:
    Using List in Python 3, this could be done in a simpler way

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern
    def pypart(n):
        myList = []
        for i in range(1,n+1):
            myList.append("*"*i)
        print(" ".join(myList))
      
    # Driver Code
    n = 5
    pypart(n)



  • After 180 degree rotation
    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern
    def pypart2(n):
          
        # number of spaces
        k = 2*n - 2
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # inner loop to handle number spaces
            # values changing acc. to requirement
            for j in range(0, k):
                print(end=" ")
          
            # decrementing k after each loop
            k = k - 2
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing stars
                print("* ", end="")
          
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    pypart2(n)

    Output:

            * 
          * * 
        * * * 
      * * * * 
    * * * * * 
    

  • Printing Triangle

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern triangle
    def triangle(n):
          
        # number of spaces
        k = 2*n - 2
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # inner loop to handle number spaces
            # values changing acc. to requirement
            for j in range(0, k):
                print(end=" ")
          
            # decrementing k after each loop
            k = k - 1
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing stars
                print("* ", end="")
          
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    triangle(n)

    Output:

        * 
       * * 
      * * * 
     * * * * 
    * * * * * 
    

  • Number Pattern

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern of numbers
    def numpat(n):
          
        # initialising starting number 
        num = 1
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # re assigning num
            num = 1
          
            # inner loop to handle number of columns
                # values changing acc. to outer loop
            for j in range(0, i+1):
              
                    # printing number
                print(num, end=" ")
              
                # incrementing number at each column
                num = num + 1
          
            # ending line after each row
            print(" ")
      
    # Driver code
    n = 5
    numpat(n)

    Output:

    1 
    1 2 
    1 2 3 
    1 2 3 4 
    1 2 3 4 5 
    

  • Numbers without re assigning

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern of numbers
    def contnum(n):
          
        # initializing starting number 
        num = 1
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # not re assigning num
            # num = 1
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing number
                print(num, end=" ")
              
                # incrementing number at each column
                num = num + 1
          
            # ending line after each row
            print(" ")
      
    n = 5
      
    # sending 5 as argument
    # calling Function
    contnum(n)

    Output:

    1 
    2 3 
    4 5 6 
    7 8 9 10 
    11 12 13 14 15 
    

  • Character Pattern
    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern of alphabets
    def alphapat(n):
          
        # initializing value corresponding to 'A' 
        # ASCII value
        num = 65
      
        # outer loop to handle number of rows
        # 5 in this case
        for i in range(0, n):
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # explicitely converting to char
                ch = chr(num)
              
                # printing char value 
                print(ch, end=" ")
          
            # incrementing number
            num = num + 1
          
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    alphapat(n)

    Output:

    A 
    B B 
    C C C 
    D D D D 
    E E E E E 
    

  • Continuous Character pattern

    # Python code 3.x to demonstrate star pattern
      
    # Function to demonstrate printing pattern of alphabets
    def  contalpha(n):
          
        # initializing value corresponding to 'A' 
        # ASCII value
        num = 65
      
        # outer loop to handle number of rows
    -   for i in range(0, n):
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # explicitely converting to char
                ch = chr(num)
              
                # printing char value 
                print(ch, end=" ")
              
                # incrementing at each column
                num = num +1
          
          
            # ending line after each row
            print(" ")
      
    # Driver code
    n = 5
    contalpha(n)

    Output:

    A 
    B C 
    D E F 
    G H I J 
    K L M N O 
    
  • Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

    Patterns can be printed in python using simple for loops. First outer loop is used to handle number of rows and Inner nested loop is used to handle the number of columns. Manipulating the print statements, different number patterns, alphabet patterns or star patterns can be printed.
    Some of the Patterns are shown in this article.

  • Simple pyramid pattern

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern
    def pypart(n):
          
        # outer loop to handle number of rows
        # n in this case
        for i in range(0, n):
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing stars
                print("* ",end="")
           
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    pypart(n)

    Output:

    * 
    * * 
    * * * 
    * * * * 
    * * * * * 
    



  • After 180 degree rotation
    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern
    def pypart2(n):
          
        # number of spaces
        k = 2*n - 2
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # inner loop to handle number spaces
            # values changing acc. to requirement
            for j in range(0, k):
                print(end=" ")
          
            # decrementing k after each loop
            k = k - 2
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing stars
                print("* ", end="")
          
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    pypart2(n)

    Output:

            * 
          * * 
        * * * 
      * * * * 
    * * * * * 
    

  • Printing Triangle

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern triangle
    def triangle(n):
          
        # number of spaces
        k = 2*n - 2
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # inner loop to handle number spaces
            # values changing acc. to requirement
            for j in range(0, k):
                print(end=" ")
          
            # decrementing k after each loop
            k = k - 1
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing stars
                print("* ", end="")
          
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    triangle(n)

    Output:

        * 
       * * 
      * * * 
     * * * * 
    * * * * * 
    

  • Number Pattern

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern of numbers
    def numpat(n):
          
        # initialising starting number 
        num = 1
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # re assigning num
            num = 1
          
            # inner loop to handle number of columns
                # values changing acc. to outer loop
            for j in range(0, i+1):
              
                    # printing number
                print(num, end=" ")
              
                # incrementing number at each column
                num = num + 1
          
            # ending line after each row
            print(" ")
      
    # Driver code
    n = 5
    numpat(n)

    Output:

    1 
    1 2 
    1 2 3 
    1 2 3 4 
    1 2 3 4 5 
    

  • Numbers without re assigning

    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern of numbers
    def contnum(n):
          
        # initializing starting number 
        num = 1
      
        # outer loop to handle number of rows
        for i in range(0, n):
          
            # not re assigning num
            # num = 1
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # printing number
                print(num, end=" ")
              
                # incrementing number at each column
                num = num + 1
          
            # ending line after each row
            print(" ")
      
    n = 5
      
    # sending 5 as argument
    # calling Function
    contnum(n)

    Output:

    1 
    2 3 
    4 5 6 
    7 8 9 10 
    11 12 13 14 15 
    

  • Character Pattern
    # Python 3.x code to demonstrate star pattern
      
    # Function to demonstrate printing pattern of alphabets
    def alphapat(n):
          
        # initializing value corresponding to 'A' 
        # ASCII value
        num = 65
      
        # outer loop to handle number of rows
        # 5 in this case
        for i in range(0, n):
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # explicitely converting to char
                ch = chr(num)
              
                # printing char value 
                print(ch, end=" ")
          
            # incrementing number
            num = num + 1
          
            # ending line after each row
            print(" ")
      
    # Driver Code
    n = 5
    alphapat(n)

    Output:

    A 
    B B 
    C C C 
    D D D D 
    E E E E E 
    

  • Continuous Character pattern

    # Python code 3.x to demonstrate star pattern
      
    # Function to demonstrate printing pattern of alphabets
    def  contalpha(n):
          
        # initializing value corresponding to 'A' 
        # ASCII value
        num = 65
      
        # outer loop to handle number of rows
    -   for i in range(0, n):
          
            # inner loop to handle number of columns
            # values changing acc. to outer loop
            for j in range(0, i+1):
              
                # explicitely converting to char
                ch = chr(num)
              
                # printing char value 
                print(ch, end=" ")
              
                # incrementing at each column
                num = num +1
          
          
            # ending line after each row
            print(" ")
      
    # Driver code
    n = 5
    contalpha(n)

    Output:

    A 
    B C 
    D E F 
    G H I J 
    K L M N O 
    
  • Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.



    This article is attributed to GeeksforGeeks.org

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