How to get the Index of Specified Element in an Array in Kotlin - Step by Step Examples
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 objectarr
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 objectarr
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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