Excuse me, how can the for loop variable i be referenced?

[ankicat]

I simplified the content, as shown in the figure.
No output results.
The code is as follows.

I really tried my best to figure out why I made a mistake.
Do you have any ideas?
I will correct it right away.

[NielegalneApfelschor]

The same code works fine for me:

Maybe you accidentally put full-width characters somewhere (ａ instead of a)? Or you are editing and previewing different cards? The code you have on the screenshot should work.

[ankicat]

Thank you. It works.
Thank you for your advice.
Maybe I’m careless.
I retyped it with the English keyboard.
It works.

Have fun today(o^^o)