如何在数组名中添加数字

I have 5 arrays with 8 strings inside each. Each array has a name fallowed by number like 'titles1', 'titles2'... I want to create a while loop to check each string in each array. The problem that I currently have is that I am not able to change number in array names (from 1 to 5 - titles1, 2, 3 ...). Any idea how I could make it work? The code works however because the array name is a string now, it is not checking anything inside arrays. I have 5 arrays with 8 strings inside each. Eac