loops in kotlin code example

Example 1: kotlin loop

for (i in 1..5) print(i)
-> 12345

for (i in 5 downTo 1) print(i)
-> 54321

for (i in 3..6 step 2) print(i)
-> 35

for (i in 'd'..'g') print (i)
-> defg

Example 2: for loop kotlin

val array = arrayOf(1, 3, 9)
for (item in array) {
    //loops items
}
for (index in 0..array.size - 1) {
	//loops all indices
}
for (index in 0 untill array.size) {
    //loops all indices
}
for (index in array.indices) {
    //loops all indices (performs just as well as two examples above)
}

Example 3: kotlin simple for loop

val names = listOf("Jack", "John", "Tim")
for(name in names){
	println(name)
}

Example 4: kotlin iterate array

val names = listOf("Anne", "Peter", "Jeff")
for (name in names) {
    println(name)
}

Example 5: for loop kotlin

for (x in 0..10) println(x)

Example 6: while loop kotlin

for (item in collection) print(item)