Question

In Java, a comment on a line begins with which characters?

a) ''
b) //
c) ()
d) " "

Answer 1

In Java, a single-line comment begins with // which is option b). These characters indicate to the Java compiler that the subsequent text on the same line should be ignored as a comment.

Step-by-step explanation:

In Java, a comment on a line begins with the characters //. This means that the correct answer to the question is option b) //. Anything after these two forward slashes on the same line is considered a comment by the Java compiler and is ignored, so it does not affect the execution of the program.

There are two main types of comments in Java:

• Single-line comments, which begin with // and extend to the end of the line.
• Multi-line comments, which start with /* and end with */. Anything between these two markers is considered a comment.

Comments are essential for developers to explain code to themselves and others, making it easier to understand and maintain.