C Program to Print Number Pyramid Pattern

Generate Following Pattern of Pyramid

Program :

#include
#include
void main()
{
int i,n,j,x=30,y=10;
clrscr();

printf("Enter n (between 2 & 9) : ");
scanf("%d",&n);

 for(i=1;i<=n;i++)
 {
    gotoxy(x,y);
      for(j=1;j<=i;j++)
         printf("%d ",i);
    x=x-1;
    y++;
 }
getch();
}

---

Output :

Enter n (between 2 & 9) : 9
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5
6 6 6 6 6 6
7 7 7 7 7 7 7
8 8 8 8 8 8 8 8
9 9 9 9 9 9 9 9 9

---

Explain ?

gotoxy(x,y);

•  Goto xy : interpret it as “goto x y”
• Moves Cursor Position to Co-Ordinate (x,y)
• gotoxy(10,40) : moves Cursor Position to Co-ordinate (10,40)

x=x-1;
     y++;

• In Each Iteration we are moving downward so increment “y”
• For each new Iteration we are starting from beginning but one co-ordinate back so decrement x

for(j=1;j<=i;j++)
         printf("%d ",i);

• Nested Loop Used to Print All the Numbers in Particular Line . i.e in the third line i = 3 so j will print values 3 times .