Search in list thing with this condition

You can loop the list with a counter and use an if block to check if it matches.
Or you can use this logic:

upcase should not use like this…

if you want you should use for each items in the list and for every item you can use this condtion along with logical situation

i want to set text box thing to upercase and search in list with upercase ,
mean to say convert all list items to uppercase and then check is in list thing

Does my method not work? or am I misunderstanding your goal.