If I'm writing a dialog and my character get interrupted and cut off in the middle of a sentence can I write half a word and put three dots? I thought it was okay to do this, but I realized that I haven't seen this in published book (or I don't remember seeing it). So is it okay to write half a word or I should finish the word ant than put three dot?
I would finish the word with two dashes (also called an em-dash, but for traditional submission format, two regular dashes are used to indicate this), no space between the last letter of the half word and the dashes. Many editors will autocorrect two dashes to an m-dash for you. I turn that off and prefer the traditional method.
"This is redic--", Lymaba started to say, but stopped herself.