How to print the triangle pattern of numbers 1 to 15 in python?

Question

This image is my question While printing the triangle pattern from 1 to 15 numbers in 5 number of rows. I have gone through some error.

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Answer 1

If you want to print 1 to 21 then

Next = 1
for s in range(0, 6):  
    for t in range(0, s + 1):  
        print(Next, end=' ')  
        Next= Next + 1  
    print()

Output :

1 
2 3 
4 5 6 
7 8 9 10 
11 12 13 14 15 
16 17 18 19 20 21

If you want to print 1 to 15 then

Next = 1
for s in range(0, 5):  
    for t in range(0, s + 1):  
        print(Next, end=' ')  
        Next= Next + 1  
    print()

Output :

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

Answer 2

Hope this code works for you. Solution with O[N] complexity.

col = 0
curr = 1
N = 15
for i in range(1,N+1):
  if curr <col:    
    curr+=1
  else:
    print()
    col+=1
    curr=1
  print(i,end=' ')

Question: