A comment is text for the next person who reads the file, including you next month. // comments out the rest of one line. /* and */ comment out a block.
Comments are removed before the class runs, so they cannot change the output. Do not comment out code to "save it for later" in a file you compile for class. Delete the dead lines or move them out.
Example
The comment is skipped. Only the string B2 is stored and printed.
public class Notes {
public static void main(String[] args) {
// Room code for the evening batch.
String room = "B2";
System.out.println(room);
}
}A comment that repeats the next line, such as // set room, does not help. Say why the value exists when the name alone is not enough.
