how to display various pattern using for loop?

[GraxGunz]

  for (int i = 1; i <= 6; i++)
  {
    for (int j = 1; j <= i; j++)
      cout << setw(3) << j;
    cout << endl;
  }
 

above code will display below pattern:
1
1 2
1 2 3
1 2 3 4 5
1 2 3 4 5 6

  for (int i = 6; i >= 1; i--)
  {
    for (int j = 1; j <= i; j++)
      cout << setw(3) << j;
    cout << endl;
  }
 

and this code will display pattern below:
1 2 3 4 5 6
1 2 3 4 5
1 2 3 4
1 2 3
1 2
1

as what i understand

  for (int i = 6; i >= 1; i--)
  {
    cout << endl;
  }
 

above code is for creating the coloum
and

    for (int j = 1; j <= i; j++)
      cout << setw(3) << j;
 

is for print out the number from 1 to 6

my question here is what should i change or added he code above so that my output will display the pattern below:
__________1
________2_1
______3_2_1
____4_3_2_1
__5_4_3_2_1
6_5_4_3_2_1

and

1_2_3_4_5_6
__1_2_3_4_5
____1_2_3_4
______1_2_3
________1_2
__________1

note: _ is space

how can i print out my numbers that the alignment shift to the right? should i add space(" ") using if else loop for cout? or i might have a better solution??

[weaknessforcats]

Here is where you use a manipulator.

Write a function that takes an ostream& and pass in cout. Then use the ostrream& to display an underscore, then return the ostreanm&:

cout << "Hello!" << MyFunction(cout) << endl;
 

where MyFunction is:

ostream& MyFunction(ostream& os)
{
    os << "_";
    return os;
}