CODEWITHSUNDEEP
pythondesign-patterns
user17732397
user17732397

Reputation:

How to print this pyramid pattern up side down?

I am trying to print below pyramid pattern. But not clicking how to build logic for it ?

Pattern :

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

I have tried this code seems like this is not a right approach to get it.Any solution is appreciated

import numpy as np
n = 5
cnt=0
var = np.arange(1,n+1)
for row in range(1,n+1):
  print(var[::-1][cnt:])
  cnt= cnt + 1

Output of above pattern:

[5 4 3 2 1]
[4 3 2 1]
[3 2 1]
[2 1]
[1]

Upvotes: 1

Views: 138

Answers (3)

Kofi
Kofi

Reputation: 1314

You can create a function to reduce overall complexity

def pyramid(height):
   L = 0
   for i in range(height):
     s = ' '.join(map(str, range(height-i, 0, -1)))
     L = max(L, len(s))
     print(s.rjust(L))
height = int(input('Enter the height of the Pyramid : '))
pyramid(height)

Upvotes: 1

vaizki
vaizki

Reputation: 1932

Any solution? Ok:

>>> print("\n".join([ "{:>10}".format(" ".join([ str(x) for x in range(n,0,-1) ])) for n in range(5,0,-1) ]))
 5 4 3 2 1
   4 3 2 1
     3 2 1
       2 1
         1

Upvotes: 0

mozway
mozway

Reputation: 260480

Do you really need/want to use numpy?

This is easily achievable using pure python. The logic is to add spaces on the left to pad (you could also use string functions like rjust):

n = 5
for i in range(n):
    print('  '*i + ' '.join(map(str, range(n-i, 0, -1))))

output:

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

NB. if you have double digits, you should use rjust:

n = 15
L = 0
for i in range(n):
    s = ' '.join(map(str, range(n-i, 0, -1)))
    L = max(L, len(s))
    print(s.rjust(L))

output:

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

Upvotes: 1

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