Playing with triangle of characters in PYTHON

By Kalki Pareshkumar Bhavsar

Printing pattern of triangles made with one character using the fundamental concepts of PYTHON like print function and for loop only.

Triangles

Hey CodeSpeeder!

Everyone knows about functions like print() and iterative methods like for loop. Very basic, right? Yet enough to build beautiful and creative patterns to display! Explore this article further to code various triangles displayed using characters. 

Right-angled Triangles

Pattern 1: Right-angled triangle towards left

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

def right_triangle_left(ch, n):
  for i in range(n):
    print((ch+" ")*(i+1))

right_triangle_left('*', 5)

Pattern 2: Inverted right-angled triangle towards left

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

def right_triangle_left_inverted(ch, n):
  for i in range(n):
    print((ch+" ")*(n-i))

right_triangle_left_inverted('*', 5)

 

Pattern 3: Right-angled triangle towards right

                  0
               0 0
            0 0 0
         0 0 0 0
      0 0 0 0 0

def right_triangle_right(ch, n):    
  for i in range(n):
    row=" "*(2*(n-i-1))+(ch+" ")*(i+1)
    print(row)

right_triangle_right('0', 5)

Pattern 4: Inverted right-angled triangle towards right

           0 0 0 0 0

              0 0 0 0

                 0 0 0

                    0 0

                       0 
           

def right_triangle_right_inverted(ch, n):    
  for i in range(n, 0, -1):
    row=" "*(2*(n-i))+(ch+" ")*(i)
    print(row)

right_triangle_right_inverted('0', 5)

 

Mountain Triangles

Pattern 1: Mountain shaped triangle pointing towards top

                ^
              ^ ^
            ^ ^ ^
          ^ ^ ^ ^
        ^ ^ ^ ^ ^
      ^ ^ ^ ^ ^ ^

def triangle_middle(ch, n):    
  for i in range(n):
    row=" "*(n-i-1)+(ch+" ")*(i+1)
    print(row)

triangle_middle('^', 6)

Pattern 2: Mountain shaped triangle pointing towards bottom

      ^  ^  ^  ^  ^  ^

        ^  ^  ^  ^  ^

          ^  ^  ^  ^

            ^  ^  ^

              ^  ^

                ^

def triangle_middle_inverted(ch, n):    
  for i in range(n, 0, -1):
    row=" "*(n-i)+(ch+" ")*(i)
    print(row)

triangle_middle_inverted('^', 6)

Pattern 3: Mountain shaped triangle 2 pointing towards top

                    @
                @ @ @
            @ @ @ @ @
        @ @ @ @ @ @ @
    @ @ @ @ @ @ @ @ @

def triangle_big_middle_inverted(ch, n):      
  for i in range(1, 2*n, 2):
    row= (" ")*(2*n-i) + (ch+" ")*(i)
    print(row)

triangle_big_middle_inverted('@', 5)

Pattern 4: Mountain shaped triangle 2 pointing towards bottom

    @ @ @ @ @ @ @ @ @

        @ @ @ @ @ @ @

            @ @ @ @ @

                @ @ @

                    @

def triangle_big_middle_inverted(ch, n):      
  for i in range(2*n-1, 0, -2):
    row= (" ")*(2*n-i) + (ch+" ")*i
    print(row)

triangle_big_middle_inverted('@', 5)

 

Flag Triangles

Pattern 1: Flag shaped triangle pointing towards right

        >

        >   >

        >   >   >

        >   >   >   >

        >   >   > 

        >   >

        >

def triangle_flag_towards_right(ch, n):
  n=n//2
  right_triangle_left(ch, n+1)
  right_triangle_left_inverted(ch, n)

triangle_flag_towards_right('>', 7)

Pattern 2: Flag shaped triangle pointing towards left

                        <

                   <   <

             <   <   <

        <   <   <   <

             <   <   < 

                   <   <

                        <

def triangle_flag_towards_left(ch, n):
  n=n//2
  right_triangle_right(ch, n+1)
  def right_triangle_right_inverted(ch, n):    
    for i in range(n, 0, -1):
      row=" "*(2*(n-i+1))+(ch+" ")*(i)
      print(row)
  right_triangle_right_inverted(ch, n)

triangle_flag_towards_left('<', 7)

 

I have tried to display the most common types of triangles that are constructed using only one character.

 

Fact-point!

Your looping fundamentals will surely improve after practicing these patterns.

Also, create some more amazing patterns of your own!