Oxygen within thinBasic - some Feedback

[ReneMiner]

I'm trying to understand and learn - but my brains are old, rusty and stuffed with loads of useless knowledge, that's why I still did not get it.

I know this "<=" as some comparison-operator. If it's used to assign values it would be enough to use just "=".
So does this assign the values to the array ordered from smallest to largest or what?
Or does it assign only values if the original value of the variable is smaller than the new one?
or is it just supposed to symbolize an arrow as "->" in some older c-dialect?

Edit: hours later ...does it mean to assign the count of elements to the variable enclosed in brackets?