Answer 1

for (i=1;i <=5;i++)
{
for (j=1;j<=i;j++)
System.out.print (i);
System.out.println ();
}

sample output
1
22
333
4444
55555

this will help u change the printing value(i/j) for different patterns.
For upside down pyramid change j=1 to j=5 and j--