Where can I find a code autocomplete Mac editor?

Hallo!
I have thrown in the towel and now I have switched to Mac for my web development work. New things are good, but they come with a few challenges here and there, and so I am here with one. I have been trying to figure out a code autocomplete Mac editor to use in my development work. Is there an inbuilt one in Mac? If not, is there one that you would recommend which is fairly priced or free altogether? Thanks in advance.
