Do we respond to one who greeted us by saying "Salam" and did not complete it?

Question : When they pass by, they say "Salam" and do not complete "Salamu alaykum."

Answer : "Alaykum" is... When the messengers came to Ibrahim, they said, "What?" "Salam." He said, "Salam." It contains only one of the two parts of the phrase. Yes, there is no harm, there is no harm. He should respond, he should respond. Some scholars said that if he says "Salam" and does not respond to him, but that is a mistake; it is not correct. If he says "Salam," he should respond to him.