1

2      3

4      5     6

7      8     9      10

11  12   13     14     15


#include<stdio.h>
#include<conio.h>

void main()
{
    int i,j,k=1,n;
    clrscr();
    printf("Enter how many line you need to make pyramid = ");
    scanf("%d",&n);
   
    for(i=1;i<=n;i++)
    {
       for(j=1;j<=i;j++)
       printf("%4d",k++);
       printf("\n");
    }

    getch();
}

///////////////////////////////////////////////////////////////////////////
Copy & paste this code in your TC & run, then you will get output.......
If you have any problem please comment below.........