• Its possible to loop inside a loop.
  • Useful to handle two dimentional data structures.
  • Draw matrix of points.
    • int no_of_rows = 5;
int no_of_cols = 7;
int startX=10;
int startY=10;
for(int row=0; row < no_of_rows; row++){
	//for each row draw a column
	for(int col=0; col < no_of_cols; col++){
		point(row*startX,col*startX);
	}
}