Comment

Reading Time: < 1 minuteCommenting code is a good practice, helping you and your fellow programmers understand and maintain the code.

Whatever you write in the comment is ignored by Kotlin compiler.

There are 2 types of comment in Kotlin

• Single-line Comments
• Mulit-line Comments

Single-Line Comments

To write single line Kotlin comment, you need to user //.

//This is a single line comment

… and a complete example.

fun main(args: Array<String>)
{
println("Hello, World")
//println("Hello, Kotlin")
}

//Hello, World

What will happen when // is removed from the program?

The second println will be pritned out as well.

fun main(args: Array<String>)
{
println("Hello, World")
println("Hello, Kotlin")
}

//Hello, World
//Hello, Kotlin

Multi-Line Comments

There are 2 ways to do it.

Using //
In this case, you will have to write // in each line before writing the comment.

fun main(args: Array<String>)
{
//println("Hello, World")
//println("Hello, Kotlin")
}

What if you have to write 20 lines of comment?
It is not a good idea of writing multiple lines of comment in Kotlin using //.
The good way in this case is /*..*/

fun main(args: Array<String>)
{
/*
* This is multiple lines of comment
* You can write a long sentences
* in multiple lines in this way
*/
}

Questions

I hope the description was understandable and clear. But if you have still questions, then leave me comments below! 😉

Have a nice a day! 🙂

 

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