حلقه for در کاتلین — به زبان ساده

1val fruits = listOf("Apple", "Banana", "Cherries", "Guava")
2for (fruit in fruits) {
3    println(fruit)
4}
5// Prints: Apple, Banana, Cherries, Guava

1for (number in 0..5) {
2    println(number)
3}
4// Prints: 0 through 5

1for (number in 0 until 5) {
2    println(number)
3}
4// Prints: 0 through 4

1for (number in 5 downTo 0) {
2    println(number)
3}
4// Prints: 5 to 0

1for (number in 0..10 step 2) {
2    println(number)
3} 
4// Prints: 0, 2, 4, 6, 8, 10
5for (number in 10 downTo 0 step 2) {
6    println(number)
7}
8// Prints: 10, 8, 6, 4, 2, 0
9val fruits = listOf("Apple", "Banana", "Cherries", "Guava")
10for (index in fruits.indices step 2) {
11    println(fruits[index])
12}
13// Prints: Apple, Cherries

1val fruits = listOf("Apple", "Banana", "Cherries", "Guava")
2for ((index, fruit) in fruits.withIndex()) {
3    println("$index - $fruit")
4}
5// Prints: 0 - Apple, 1 - Banana, 2 - Cherries, 3 - Guava

1val fruits = listOf("Apple", "Banana", "Cherries", "Guava")
2for (index in fruits.indices) {
3    println(fruits[index])
4}
5// Prints: Apple, Banana, Cherries, Guava

1val fruitMap = mapOf("A" to "Apple", 
2                     "B" to "Banana", 
3                     "C" to "Cherries", 
4                     "G" to "Guava")
5    
6for (entry in fruitMap) {
7    println(entry.key + "-" + entry.value)
8}
9// Prints: A-Apple, B-Banana, C-Cherries, G-Guava
10
11for ((key, value) in fruitMap) {
12    println(key + "-" + value)
13}
14// Prints: A-Apple, B-Banana, C-Cherries, G-Guava