Display pattern #1

/* Program to display the following pattern:
1
12
123
1234
12345
*/
#include<iostream.h>
#include<conio.h>
void main()
{
    clrscr();
    for(int i=1;i<=5;i++)
    {
        for(int j=1;j<=i;j++)
        cout<<j;
        cout<<endl;
    }
    getch();
}