Ranges help to eliminate junk data that sometimes shows up on the screen. Overall, it makes the data look precise and organized. This is also before the set-up.

if (distance> x) {distance=x;} //states that if the distance calculated is greater than a certain number, then the ranges causes the distance to equal that certain number (establishes "x" as the maximum number)

if (distance<y) {distance=y;} //states that if the distance calculated is less than a certain number, then the range causes the distance to equal that certain number (establishes "y" as the minimum number)

return (distance); //returns the desired distance