abs(a) returns the absolute value of a.

mathematical: |a|

The number a becomes positive, if it was negative. The number stays positive, if it was positive.

Example:

abs(-3) = 3

abs(7) = 7

Where can you use the abs function?

We want to write an example program, where an object jumps randomly inside a frame but is not allowed to jump outside. If it would jump outside it is again placed in the middle at x=0 and y=0.

So we can start with an forever loop. In this loop we can put in some blocks to randomly change x and y by some number. And it would be a good idea also to put in an wait 1 second block. After that we can take an if-clause with the condition so that if the object jumps outside of the frame. In my case the frame was on x = ±492, so if clause is if [abs( position x ) ≥ 492] is true then place at x=0 and y=0. The next blocks are same with position y.

Code: