How do I set text to the y value of an array?

I assume you are asking about a 2D array?

Text set text to str(Array.at(xIndex, yIndex))

On Enter pressed: Array set value at XY (xIndex, yIndex) to (Array.at(xIndex, yIndex)+1)

Array width=1 means that it only has one row on X axis. And array indices are zero-based, so array.at(1,1) expression is wrong - row #1 doesn't exist.

Can you explain what are you trying to achieve? I see you are loading the array from a file, can you show a screenshot of that file?

Also, move the "Text3 set text" action to event #2.

Remove quotation marks from all strings in the array, they are not needed.

After loading it, you should be able to access any line using Array.at(0,y) expression.

For example, Array.at(0,3) will return: hello!

Did you move "Set text" action into "AJAX on completed" event?

If that doesn't help, please share your project file.

Not sure what you mean. In Array.at(0,3) expression the number 3 is the y-index. You can use a variable and increment it. For example:

Number y=0

Every 5 seconds 
 -> Add 1 to y
 -> Text set text to Array.at(0, y)

Repeat 10 times
 -> Wait (loopindex) seconds
 -> Text set text to Array.at(0, loopindex)