How do I concatenate combinations of letters and numbers in APL?

Question

I'm in Dyalog 17 and would like to generate unique names to be used with its graphics object library. So, for example, I have the letter 'l' and want to take the number 1, convert it to a character and then concatenate the two together to form 'l1'. This is such trivial stuff in other languages but I can't find the documentation explaining how to do this in APL. Thanks for your help!

Answer 1

To concatenate the letter 'l' to the number 1 to form the characters 'l1' you do this:

'l',⍕1