Kotlin Flow Control : For Loops

Like other programming languages, Kotlin also provides many kinds of Looping methodology, In this article we will discuss about "For" loop. Kotlin "For" is similar to foreach loop in C# language.

Syntax:
for (item: Int in ints) {
    print(item) // body
}
Note : Body can also be without block.

Example:

fun main(args: Array<String>) {
   val items = listOf(1, 2, 3, 4, 5)
   for (i in items) { 

    println("values of the array -"+i)

   }
}

Output:
Values of the array -1
Values of the array -2
Values of the array -3
Values of the array -4
Values of the array -5

Or you can also use range.

Example:

fun main(args: Array<String>) {
   for (i in 1..5) println("Loop -"+i)
}

Output :
Loop -1
Loop -2
Loop -3
Loop -4
Loop -5

Kotlin also provides some library functions to make development work easier. Here is an example.

fun main(args: Array<String>) {
   val items = listOf(11, 22, 33, 44)
   for ((index, value) in items.withIndex()) {
      println("At index $index Value is $value")
   }
}

Output:
At index 0 Value is 11
At index 1 Value is 22
At index 2 Value is 33
At index 3 Value is 44