Print a triangular pattern of asterisks

Question

I am required to use nested for loops and print(\'*\', end=\' \') to create the pattern shown here:

And here is my code. I have figured out the first t

Answer 1

Pythonic way of doing this. Just 1 line of code (using list comprehension) for each pattern.

n = 10

# for A
print('\n'.join(['*'*i for i in range(1,n+1)]))

#output
*
**
***
****
*****
******
*******
********
*********
**********


# for B
print('\n'.join(['*'*i for i in range(n+1,0,-1)]))

#output
***********
**********
*********
********
*******
******
*****
****
***
**
*

# for C
print('\n'.join([' '*(n-i) + '*'*i for i in range(n,0,-1)]))

#output
**********
 *********
  ********
   *******
    ******
     *****
      ****
       ***
        **
         *


# for D
print('\n'.join([' '*(n-i) + '*'*i for i in range(1,n+1)]))

#output
         *
        **
       ***
      ****
     *****
    ******
   *******
  ********
 *********
**********