- prompt the user to enter number of line (1 – 15)
- prints a number pyramid

number = eval(input("Enter the number of lines(only 1 - 15): ")) if (number >= 1) and (number <= 15): for i in range(number): nToPrint = i + 1 spaces = number - nToPrint for j in range(spaces): print(" ",end="") n = nToPrint while n >= 1: print(format(n,"3d"),end="") n -= 1 if(i+1) >= 2: for k in range(1,(i+1),1): print(format((k+1), "3d"), end="") print() else: print("Number have to be 1 - 15")