NESTED Loops HELP

I need to output the following and I cant seem to get it
1.

*
**
***
****

2.
****
***
**
*

3.
1
12
123
1234

4.
4444
333
22
1

5.
1234
234
34
4

6.
1111
222
33
4

7.

*
**
***
****

===========
The first one worked but the following ones didn't

This is the first one "

int d = 0;
int a = 0;
for (d=1; d<=4; d++)
{
cout << endl;
for (a=1; a<=d; a++)
{
cout << " * " ;
}
}
What if you reverse the code.. by decrementing it. I'm not sure but give it a shot

What is the difference between numbers 1 and 7?
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