Simple Diamond Pattern in Python

Given an integer n, the task is to write a python program to print diamond using loops and mathematical formulations. The minimum value of n should be greater than 4.

Examples :

For size = 5

  * * *   
* * * * * 
  * * *   
    *  
    
For size = 8

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

For size = 11

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

Approach :

The following steps are used :

• Form the worksheet of (size/2+2) x size using two loops.
• Apply the if-else conditions for printing stars.
• Apply else condition for rest spaces.

Below is the implementation of the above approach :

Example 1:

Python3

# define the size (no. of columns)
# must be odd to draw proper diamond shape
size = 8

# initialize the spaces
spaces = size

# loops for iterations to create worksheet
for i in range(size//2+2):
    for j in range(size):

        # condition to left space
        # condition to right space
        # condition for making diamond
        # else print *
        if j < i-1:
            print(' ', end=" ")
        elif j > spaces:
            print(' ', end=" ")
        elif (i == 0 and j == 0) | (i == 0 and j == size-1):
            print(' ', end=" ")
        else:
            print('*', end=" ")

    # increase space area by decreasing spaces
    spaces -= 1

    # for line change
    print()

Output :

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

Example 2:

Python3

# define the size (no. of columns)
# must be odd to draw proper diamond shape
size = 11

# initialize the spaces
spaces = size

# loops for iterations to create worksheet
for i in range(size//2+2):
    for j in range(size):

        # condition to left space
        # condition to right space
        # condition for making diamond
        # else print ^
        if j < i-1:
            print(' ', end=" ")
        elif j > spaces:
            print(' ', end=" ")
        elif (i == 0 and j == 0) | (i == 0 and j == size-1):
            print(' ', end=" ")
        else:
            print('*', end=" ")

    # increase space area by decreasing spaces
    spaces -= 1

    # for line change
    print()

Output :

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