I am new to Xcode and came by pycharm. In pycharm, I am able to use watcher to execute the statement and store as local variable in debugger mode. How could I do that same thing from Xcode debugger lldb?
for example

let a = 5
letba = 5
let aPlusb = Self.addFunc(a, b)

after place debugger on line 3. how can i call Self.addFunc() and store into some variable xy

I have tried expression or e under lldb and then po xy but it does not work with error

error: expression failed to parse:
error: <EXPR>:8:1: error: cannot find 'xy' in scope
`xy`