Is code within a program always location specific?

Question

I've been learning ruby, and it seems like things are very location specific within the text document itself.

Example:

x = 10
puts x
# any code written in between these two lines treats x as 10
x += 10
puts x
# any code written after this last line treats x as 20

So I'm imaging myself in the future becoming confused by the fact that WHERE within the document I add code is going to be so important going forward. How does this work, do I get used to thinking of code like this?

Answer 1

as long as you defined it first before you call an action there will be no problem

Answer 2

it could be better for you if you use comments :)

Answer 3

what do you mean b33

Answer 4

All comments are not seen if you run a program.
Example:
In HTML <!--this is comment--> every language has its comment bro so that you can note yourself.

Answer 5

Oh I see what you are saying. Use comments to keep things clear.

So you are saying this location thing is the way it is? I'm forseeing many potential issues, what if I have multiple variables and want to use a version of a variable that has since been redefined? Can I refer to previous versiins of a variable within the document?

Is a variable ever a true variable? Or it just means what it means for a certain number of lines and is otherwise different?

Answer 6

Of course it will be different if you use different set of codes. Ruby probably has code that can redefine a specific variable just like in all languages.