Question

number of rectangles in this square of 3X3

answer is 22..?
can anyone explain how

for(int rect_width=1;rect_width<=width;rect_width++)
for(int rect_height=1;rect_height<=height;rect_height++) {
if (rect_width==rect_height) continue; // Don't count squares!
for(int left=0;left<=width-rect_width;left++)
for(int top=0;top<=height-rect_height;top++)
count++;

i couldnot understand this

Answer 1

here width=3 and height=3

Answer 2

You should calculate suchh `