示例1：
print(' ', end='') for i in range(1, 10): print(str(i).rjust(3), end='') print() for i in range(1, 10): print(i, end='') for j in range(1, 10): if i != j: print(' '*3, end='') else: print(str(i*j).rjust(3), end='') print()
示例2：
print(' ', end='') for i in range(1, 10): print(str(i).rjust(3), end='') print() for i in range(1, 10): print(i, end='') for j in range(1, 10): if i + j == 10: print(str(i*j).rjust(3), end='') elif i != j: print(' '*3, end='') else: print(str(i*j).rjust(3), end='') print()
示例3：
print(' ', end='') for i in range(1, 10): print(str(i).rjust(3), end='') print() for i in range(1, 10): print(i, end='') for j in range(1, 10): if i + j == 10: print(str(i*j).rjust(3), end='') elif j == 9: print(str(i*j).rjust(3), end='') elif i != j: print(' '*3, end='') else: print(str(i*j).rjust(3), end='') print()
示例4：
print(' ', end='') for i in range(1, 10): print(str(i).rjust(3), end='') print() for i in range(1, 10): print(i, end='') for j in range(1, 10): if i == 9: print(str(i*j).rjust(3), end='') elif i + j == 10: print(str(i*j).rjust(3), end='') elif j == 9: print(str(i*j).rjust(3), end='') elif i != j: print(' '*3, end='') else: print(str(i*j).rjust(3), end='') print()