Variable usage: Confused!

[bruibbruib]

Hi, just trying this out today and am confused how to use variables. Here is my prompt:

[choose][file prompt1]|[file prompt2][/choose]
[get "col" _default="red"]

prompt1 is a txt file:
prompt1[set "col"]blue[/set]

prompt2 is a txt file:
prompt2[set "col"]yellow[/set]

No matter what, "col" is always yellow. prompt1 and 2 will show up fine, but the variable seems set once, and then it is stuck.

Am I doing it all wrong?!?!
Any help greatly appreciated.

[TheHorscht]

It's because inner shortcodes are processed before outer shortcodes, which is mentioned in the manual under "Understanding the Processing Chain".
So in your case, [choose][file prompt1]|[file prompt2][/choose] expands to:
[choose] prompt1[set "col"]blue[/set] | prompt2[set "col"]yellow[/set] [/choose]
which in turn executes both [set] in sequence before [choose].
To solve this, use {} instead of [] for file:
[choose]{file prompt1}|{file prompt2}[/choose]

[bruibbruib]

Thank you for the clear and helpful answer.
I did read the manual, but did not have the brains to link that section to my problem!
Brilliant!