How to get the Index of Specified Element in an Array in Kotlin

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How to get the Index of Specified Element in an Array in Kotlin ?

Answer

To find the index of a specified element in an array in Kotlin, you can use the indexOf method of the Array class.

✐ Examples

1 Find Index of Element in Array of Integers

In this example,

We create an array named arr with integer values.
We use the indexOf method of the array object arr to find the index of a specific integer.
The indexOf method returns the index of the first occurrence of the specified element in the array, or -1 if the element is not present.
Finally, we print the index to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val arr = arrayOf(1, 2, 3, 4, 5)
    val index = arr.indexOf(3)
    println("Index of element 3 is: $index")
}

Output

Index of element 3 is: 2

2 Find Index of Element in Array of Strings

In this example,

We create an array named arr with string values.
We use the indexOf method of the array object arr to find the index of a specific string.
The indexOf method returns the index of the first occurrence of the specified element in the array, or -1 if the element is not present.
Finally, we print the index to standard output.

Kotlin Program

fun main(args: Array<String>) {
    val arr = arrayOf("apple", "banana", "cherry", "date")
    val index = arr.indexOf("cherry")
    println("Index of element 'cherry' is: $index")
}

Output

Index of element 'cherry' is: 2

Summary

In this tutorial, we learned How to get the Index of Specified Element in an Array in Kotlin language with well detailed examples.

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How to get the Index of Specified Element in an Array in Kotlin

How to get the Index of Specified Element in an Array in Kotlin ?

Answer

✐ Examples

1 Find Index of Element in Array of Integers

Kotlin Program

Output

2 Find Index of Element in Array of Strings

Kotlin Program

Output

Summary

More Kotlin Arrays Tutorials