Scratch

I'll explain the maths of it, justtestingstickman only explained what they do, I'll also give examples.

Round:
I assume you know how to round whole numbers, like to the nearest multiple of 10, like 77 to the nearest multiple of 10 is 80, and if it's half way between two multiples of 10, you round it up.. But if you want to round to a whole number, then it's pretty much the same. Take the number justtestingstickman used, 1.1, look at the number after the decimal point, it is nearest to 0, rather than 10, so 'round (1.1)' would be 1, and 'round (1.6)' would be 2. If you have a number like 1.45, then just check whether it is under half way between 1 and 2, by checking the first number after the decimal place.

This could be useful if you had a score variable, and the script went something like this:

if action that increases score is happening
change score by 0.1

The at the end you could round the score. It's also useful if you want to round the timer.

Mod:
This is basically the remainder of 2 numbers. 20 divided by 6 is 3 remainder 2, so
'(20) mod (6) would be 2.

A way to use this is if you had a maths test project, and one of the questions was 'Enter a multiple of 5', then you could do this:

if answer mod 5 = 0
broadcast 'Correct answer'

Abs:
Abs means 'Absolute Number', basically, the abs of -5 is 5, and the Abs of 5 is 5. So it is always the whole number of itself, if it isn't a whole number already. #

The main use of Abs is in scrolling, where you would use the script:

When green flag pressed
forever
if Abs of x position > 454
hide
else show

Which is a necessary script to make sprites hide or show depending on whether they're supposed to be there or not.

I hope that hopes.

Last edited by WeirdF (2009-12-29 15:10:12)

Chrischb wrote:

I think a simple definition for abs is "distance from zero"...

Yup. that's it!

I was half asleep when I posted the explanation so I only included what they do ^_^

WeirdF wrote:

Chrischb wrote:

I think a simple definition for abs is "distance from zero"...

That's a good way to explain it! I never thought of that.

abs=absolute number.<abs(-7=7

To be honest, I've never even seen these blocks before.

3rd grade -_-