How to check if a List is Not Empty in Kotlin - Step by Step Examples

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How to check if a List is Not Empty in Kotlin ?

Answer

To check if a list is not empty in Kotlin, you can use the isNotEmpty() method of the List class.

✐ Examples

1 Check if a List with Elements is Not Empty

In this example,

We create a list named myList with some elements.
We use an if statement to check if myList is not empty by calling the isNotEmpty() method.
If the list is not empty, the code inside the if block is executed.
We print a message indicating that the list is not empty.

Kotlin Program

fun main() {
    val myList = listOf(1, 2, 3)
    
    if (myList.isNotEmpty()) {
        println("The list is not empty")
    } else {
        println("The list is empty")
    }
}

Output

The list is not empty

2 Check if an Empty List is Not Empty

In this example,

We create a list named emptyList without any elements.
We use an if statement to check if emptyList is not empty by calling the isNotEmpty() method.
Since the list is empty, the code inside the else block is executed.
We print a message indicating that the list is empty.

Kotlin Program

fun main() {
    val emptyList = listOf<Int>()
    
    if (emptyList.isNotEmpty()) {
        println("The list is not empty")
    } else {
        println("The list is empty")
    }
}

Output

The list is empty

Summary

In this tutorial, we learned How to check if a List is Not Empty in Kotlin language with well detailed examples.

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How to check if a List is Not Empty in Kotlin - Step by Step Examples

How to check if a List is Not Empty in Kotlin ?

Answer

✐ Examples

1 Check if a List with Elements is Not Empty

Kotlin Program

Output

2 Check if an Empty List is Not Empty

Kotlin Program

Output

Summary

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