Finding index from panel

Hello People!

I’ve an input and 2 panels full of values (A,B)
The “A” panel is always containing the Input number.
My first question is, how can i find the index number of “A” where the Value is equals with the input ?
The Second is , how can I find the same index number at “B” than write the Value which belongs to that index?
Here is the picture and .gh file

Thank you !

Finding (6.2 KB)

Finding (10.5 KB)

Not exactly, but you helped me to find the right solution. Thank you

Finding index (9.5 KB)