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pythonloops

Python Patterns

I am not getting how to do it, I keep on running into a problem.

The following is the code:

rows = int(input())

for i in range(1,rows):
    for j in range(1,i+1):
        print(" ", end='')

    for j in range(i, rows+1):
        print(j, end='')
    print()

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

    for i in range(i, rows+1):
        print(j,end='')
        j = j+1   
    print()

**My Output**
 12345
  2345
   345
    45
     5
    45
   345
  2345
 12345

**Expected Output**
12345
 2345
  345
   45
    5
   45
  345
 2345
12345

The space in the first column.

How to remove it ????

here, rows = 6 (as input from the user)

Solution

  • I think this is somewhat cleaner:

    lst = [str(i) for i in range(1, rows+1)]
for i in range(rows):
    print((" "*i) + "".join(lst[i:]) )

for i in range(rows-2, -1, -1):
    print((" "*i) + "".join(lst[i:]) )

    which results in:

    12345
 2345
  345
   45
    5
   45
  345
 2345
12345