Python Program for Printing Inverted Hollow Pyramid Star Pattern

Print Inverted Hollow Pyramid Star Pattern

Let’s look at the program for hollow inverted right triangle star pattern in python.

Enter the Number: 7
 *************
  *         *
   *       *
    *     *
     *   *
      * *
       *
star

Hollow inverted right triangle star pattern in python

Working:

  • Step 1. Start
  • Step 2. Take number of rows as input from the user and stored it into num.
  • Step 3. Run a loop ‘i’ number of times to iterate through all the rows which is Starting from i=0 to num. 
  • Step 4. Run a nested loop inside the main loop for printing spaces which is starting from j=0 to i.
  • Step 5. Run a nested loop inside the main loop for printing stars which is starting from j=num*2 to (num*2 – (2*i – 1))+1.
  • Step 6. Inside the above loop print stars only if i == 1 or j == 1 or j ==(num*2 -(2*i-1)) in all other cases print a blank space.
  • Step 7. Move to the next line by printing a new line using print() function.
  • Step 8. Stop

Python Program:

Run
num = int(input("Enter the Number: "))

for i in range(1, num+1):
    for j in range(0, i):
        print(" ", end="")

    for j in range(1, (num*2 - (2*i - 1))+1):
        if i == 1 or j == 1 or j ==(num*2 -(2*i-1)):
            print("*", end="")
        else:
            print(" ", end="")
    print()

Output

Enter the Number: 7
 *************
  *         *
   *       *
    *     *
     *   *
      * *
       *

Process finished with exit code 0

One comment on “Python Program for Printing Inverted Hollow Pyramid Star Pattern”


  • Khushboo

    n = int((input(“Enter the number:)))
    for i in range(n,-1,-1):
    if ((i==0) or (i==n)):
    print(” “*(n-i)+ (“*”)*(2*i+1))
    else:
    print(” “*(n-i) + (“*”) + (” “)*(2*i -1) + (“*”))