About numbers and rounding
Sometimes we want to display numbers as part of a sim. If you have a variable, like
velocityOfCat for example, and want to display it using the function
text(velocityOfCat) you might end up seeing a number with a lot of decimal places after it, (press play below to see a demo)
That many decimal places is obviously not too useful. So, we can use the function
toFixed() to trim those unsightly numbers:
Math.round(velocityOfDog * 100) / 100 ;
will output something with 2 decimal places.