Kotlin Comments
In this article, you will learn about Kotlin comments, and why and how to use them.
In programming, comments are portion of the program intended for you and your fellow programmers to understand the code. They are completely ignored by the Kotlin compiler (Kompiler).
Similar like Java, there are two types of comments in Kotlin
/* ... */
// ....
Traditional comment /* … */
This is a multiline comment that can span over multiple lines. The Kotlin compiler ignores everything from /*
to */
. For example,
/* This is a multi-line comment.
* The problem prints "Hello, World!" to the standard output.
*/
fun main(args: Array<String>) {
println("Hello, World!")
}
The tradition comment is also used for documenting Kotlin code (KDoc) with a little variation. The KDoc comments starts with /**
and ends with */
.
End of Line Comment //
The compiler ignores everything from //
to the end of the line. For example,
// Kotlin Hello World Program fun main(args: Array<String>) { println("Hello, World!") // outputs Hello, World! on the screen }
The program above contains two end of line comments:
// Kotlin Hello World Program
and
// outputs Hello, World! on the screen
Use Comments the Right Way
In most cases, use comments to explain ‘why’ rather than ‘how’ and you are good to go.
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