C Program to Print Number Pyramid Pattern

Generate Following Pattern of Pyramid
Program :

#include<stdio.h>
#include<conio.h>
int main() {
   int i, num, j, xpos = 30, ypos = 10;
   clrscr();
   printf("Enter n (between 2 & 9) : ");
   scanf("%d", &num);
   for (i = 1; i <= num; i++) {
      gotoxy(xpos, ypos);
      for (j = 1; j <= i; j++)
         printf("%d ", i);
      xpos = xpos - 1;
      ypos++;
   }
   return (0);
}

#include<stdio.h>

#include<conio.h>

int main() {

int i, num, j, xpos = 30, ypos = 10;

clrscr();

printf("Enter n (between 2 & 9) : ");

scanf("%d", &num);

for (i = 1; i <= num; i++) {

gotoxy(xpos, ypos);

for (j = 1; j <= i; j++)

printf("%d ", i);

xpos = xpos - 1;

ypos++;

}

return (0);

}

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

Enter n (between 2 & 9) : 9

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);

1	gotoxy(x,y);

Gotoxy : 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++;

1 2	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);

1 2	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 .

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C Program to Print Number Pyramid Pattern