Asterisks Graph program using C language

#include<stdio.h>
main()
{
int i,j,r;
printf("\n Enter number of rows");
scanf("%d",&r);
for(i=0;i<r;i++)
{
for(j=0;j<i+1;j++)
{
printf("* \t");
}
printf("\n");
}
getch();
}