program to display following numeric pattern.

//program to display following numeric pattern.
//               1 2 3 4 5
//               2 4 6 8 10
//               3 6 9 12 15
#include<stdio.h>
#include<conio.h>
void main(void)
{
clrscr();
int i,j;
 for(i=1;i<=3;i++)
   {

  for(j=1;j<=5;j++)

      {
      printf(" %d",i*j);

     }

    printf("\n");

}

getch();

}
-----------------------------------
logic in mind:-
------------------------------------
1)we have to display 1 2 3 4 5 then different numbers in second row..
2)we can see there are three rows so we use first loop(outer) with three execution times. And there are    5 columns so we use one another loop for columns(inner).
3) since the pattern is like
        1*1  1*2 1*3 1*4 1*5
       2*1   2*2 2*3 2*4 2*5
and so on.
4) For this, We have used nested loop as shown above.
5)For each value of outer loop(value of 'i'), the inner loop executes 5 times. And it goes to display numbers.
 while displaying, it multiplies both numbers and displays on screen.

  ------------------
program's screenshot with output:-
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program's screen

output's screen

program to display following numeric/star pattern.

//program to display following numeric pattern.
//      5
//      44
//      333
//      2222
//      11111        
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j;
for(i=5;>=1;i--)
  {
     for(j=5;j>=i;j--)
          {
                printf("%d",i);
          }
       printf("\n");
 }
getch();
}
--------------------------------------------------------
logics in mind:
----------------------
1)we have to display 5,then 44, then 333,so on.  we use loop for this.
 2)since the displays are in repetitive form ,,we set up the loop in nested form such that
        internal loop executes first  time with display of numbers(above) which it takes from outer loop,then 
two times  and it goes on decreasing.
3)First loop(outer) takes value 5 and assigns to inner.The inner executes one time with display taken from outer loop.
4)next time, the outer loop takes the value 4 and transfers to inner loop, it displays number taken from outer loop again and again.and it goes on.
............................................................................................
if you want to display "*" then use "*" in printf function.