python - I am trying to get an upper triangle in a matrices, but i did not get an expected output. Could everyone help me out -

# timestable.py  t = int(input("what size of multiplication table see (enter 1 – 12)?")) if (t <=12):     s = input("what kind table display, enter either r, u, or l? (r regular full matrix, u upper triangular matrix, l lower triangular matrix)?")     if s=="r":            row in range (1,t+1):               col in range (1,t+1):                   prod = row * col                   if prod < 10:                       print(' ', end = '')                    print(row * col, ' ', end = '')                print()     elif  s== "l" :           in range(1,t+1):             j in range (1, i+1):                 prod = *j                 if prod < 10:                   print(' ', end = '')                 print(i * j, ' ', end = '')             print()     elif  s== "u" :           in range(1,t+1):             j in range (1, i-1):                 prod = *j                 if prod < 10:                   print(' ', end = '')                 print(j * i, ' ', end = '')             print()               else :     t= int(input("please enter valid multiplecation table size (enter 1 – 12)?")) 

if want upper(lower) triangular matrix know element x @ position i,j > j (i < j) 0. suggest use condition and, regarding output, use tab.

# upper example t = 6 in range(1, t+1):     j in range (1, t+1):         if > j:             print("0\t", end=' ') # use whitespace if want instead of 0         else:             prod = i*j             print("%s\t" % prod, end=' ')     print() 

output

1    2   3   4   5   6 0    4   6   8   10  12 0    0   9   12  15  18 0    0   0   16  20  24 0    0   0   0   25  30 0    0   0   0   0   36